/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-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:08:06,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:08:06,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:08:06,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:08:06,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:08:06,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:08:06,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:08:06,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:08:06,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:08:06,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:08:06,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:08:06,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:08:06,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:08:06,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:08:06,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:08:06,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:08:06,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:08:06,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:08:06,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:08:06,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:08:06,692 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 19:08:06,702 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:08:06,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:08:06,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:08:06,705 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:08:06,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:08:06,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:08:06,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:08:06,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:08:06,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:08:06,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:08:06,706 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:08:06,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:08:06,706 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:08:06,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:08:06,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:08:06,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:08:06,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:08:06,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:08:06,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:08:06,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:08:06,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:08:06,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:08:06,707 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:08:06,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:08:06,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:08:06,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:08:06,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:08:06,921 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:08:06,929 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:08:06,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2022-01-31 19:08:06,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a6a4d85/688ce029354e45fe811729f919297a7a/FLAG3dbabe68b [2022-01-31 19:08:07,332 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:08:07,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-2.i [2022-01-31 19:08:07,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a6a4d85/688ce029354e45fe811729f919297a7a/FLAG3dbabe68b [2022-01-31 19:08:07,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a6a4d85/688ce029354e45fe811729f919297a7a [2022-01-31 19:08:07,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:08:07,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:08:07,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:08:07,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:08:07,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:08:07,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:08:07" (1/1) ... [2022-01-31 19:08:07,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b30a889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:07, skipping insertion in model container [2022-01-31 19:08:07,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:08:07" (1/1) ... [2022-01-31 19:08:07,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:08:07,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:08:07,512 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-programs/copysome1-2.i[805,818] [2022-01-31 19:08:07,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:08:07,542 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:08:07,550 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-programs/copysome1-2.i[805,818] [2022-01-31 19:08:07,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:08:07,573 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:08:07,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:07 WrapperNode [2022-01-31 19:08:07,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:08:07,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:08:07,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:08:07,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:08:07,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:07" (1/1) ... [2022-01-31 19:08:07,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:07" (1/1) ... [2022-01-31 19:08:07,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:07" (1/1) ... [2022-01-31 19:08:07,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:07" (1/1) ... [2022-01-31 19:08:07,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:07" (1/1) ... [2022-01-31 19:08:07,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:07" (1/1) ... [2022-01-31 19:08:07,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:07" (1/1) ... [2022-01-31 19:08:07,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:08:07,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:08:07,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:08:07,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:08:07,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:07" (1/1) ... [2022-01-31 19:08:07,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:08:07,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:08:07,619 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 19:08:07,627 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 19:08:07,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:08:07,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:08:07,647 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:08:07,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:08:07,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:08:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:08:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:08:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 19:08:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 19:08:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:08:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:08:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:08:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 19:08:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:08:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 19:08:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:08:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:08:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:08:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:08:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:08:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:08:07,690 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:08:07,691 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:08:07,852 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:08:07,855 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:08:07,855 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 19:08:07,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:08:07 BoogieIcfgContainer [2022-01-31 19:08:07,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:08:07,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:08:07,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:08:07,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:08:07,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:08:07" (1/3) ... [2022-01-31 19:08:07,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f207082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:08:07, skipping insertion in model container [2022-01-31 19:08:07,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:07" (2/3) ... [2022-01-31 19:08:07,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f207082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:08:07, skipping insertion in model container [2022-01-31 19:08:07,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:08:07" (3/3) ... [2022-01-31 19:08:07,886 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2022-01-31 19:08:07,889 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:08:07,889 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:08:07,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:08:07,968 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 19:08:07,968 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:08:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 19:08:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 19:08:07,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:07,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:07,986 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:07,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1972969645, now seen corresponding path program 1 times [2022-01-31 19:08:07,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:07,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046743141] [2022-01-31 19:08:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:08,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:08,032 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:08,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:08,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:08,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046743141] [2022-01-31 19:08:08,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1046743141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:08,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:08,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 19:08:08,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724459649] [2022-01-31 19:08:08,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:08,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 19:08:08,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:08,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 19:08:08,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 19:08:08,197 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:08,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:08,237 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-01-31 19:08:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 19:08:08,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 19:08:08,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:08,245 INFO L225 Difference]: With dead ends: 50 [2022-01-31 19:08:08,245 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 19:08:08,247 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 19:08:08,252 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:08,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:08:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 19:08:08,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 19:08:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-31 19:08:08,279 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2022-01-31 19:08:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:08,280 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-31 19:08:08,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-31 19:08:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 19:08:08,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:08,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:08,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:08:08,282 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1510034180, now seen corresponding path program 1 times [2022-01-31 19:08:08,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:08,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614224641] [2022-01-31 19:08:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:08,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:08,289 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:08,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:08,363 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:08,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614224641] [2022-01-31 19:08:08,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [614224641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:08,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:08,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:08:08,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569115225] [2022-01-31 19:08:08,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:08,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:08:08,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:08,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:08:08,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:08:08,365 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:08,428 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-01-31 19:08:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:08:08,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 19:08:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:08,431 INFO L225 Difference]: With dead ends: 45 [2022-01-31 19:08:08,431 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 19:08:08,435 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 19:08:08,436 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:08,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:08:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 19:08:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-01-31 19:08:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 19:08:08,443 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2022-01-31 19:08:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:08,443 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 19:08:08,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 19:08:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 19:08:08,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:08,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:08,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:08:08,444 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:08,445 INFO L85 PathProgramCache]: Analyzing trace with hash 121426345, now seen corresponding path program 1 times [2022-01-31 19:08:08,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:08,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33680796] [2022-01-31 19:08:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:08,459 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:08,459 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:08,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:08,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:08,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:08,521 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:08,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33680796] [2022-01-31 19:08:08,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [33680796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:08,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:08,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:08:08,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228123362] [2022-01-31 19:08:08,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:08,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:08:08,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:08,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:08:08,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:08:08,523 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:08,602 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-01-31 19:08:08,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:08:08,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 19:08:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:08,604 INFO L225 Difference]: With dead ends: 51 [2022-01-31 19:08:08,604 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 19:08:08,606 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 19:08:08,611 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:08,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 28 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:08:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 19:08:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-01-31 19:08:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-01-31 19:08:08,616 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2022-01-31 19:08:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:08,617 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-01-31 19:08:08,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-01-31 19:08:08,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 19:08:08,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:08,618 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] [2022-01-31 19:08:08,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:08:08,618 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:08,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1217888872, now seen corresponding path program 2 times [2022-01-31 19:08:08,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:08,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601813206] [2022-01-31 19:08:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:08,622 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:08,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:08,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:08,623 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:08,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:08,722 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:08,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601813206] [2022-01-31 19:08:08,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601813206] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:08,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:08,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:08:08,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260109709] [2022-01-31 19:08:08,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:08,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:08:08,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:08,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:08:08,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:08:08,724 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:08,800 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-01-31 19:08:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:08:08,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 19:08:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:08,801 INFO L225 Difference]: With dead ends: 59 [2022-01-31 19:08:08,801 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 19:08:08,801 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 19:08:08,802 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:08,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 33 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 19:08:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-01-31 19:08:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-01-31 19:08:08,820 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 26 [2022-01-31 19:08:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:08,820 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-01-31 19:08:08,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:08,820 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-01-31 19:08:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 19:08:08,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:08,821 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] [2022-01-31 19:08:08,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:08:08,821 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash 514163269, now seen corresponding path program 3 times [2022-01-31 19:08:08,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:08,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117364083] [2022-01-31 19:08:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:08,825 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:08,825 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:08,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:08,826 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:08,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:08,876 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:08,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117364083] [2022-01-31 19:08:08,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117364083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:08,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:08,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 19:08:08,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249602626] [2022-01-31 19:08:08,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:08,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 19:08:08,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:08,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 19:08:08,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 19:08:08,878 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:08,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:08,967 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2022-01-31 19:08:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:08:08,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 19:08:08,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:08,968 INFO L225 Difference]: With dead ends: 67 [2022-01-31 19:08:08,968 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 19:08:08,968 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 19:08:08,969 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:08,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 33 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:08:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 19:08:08,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-01-31 19:08:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-01-31 19:08:08,975 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 31 [2022-01-31 19:08:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:08,975 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-01-31 19:08:08,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-01-31 19:08:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 19:08:08,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:08,976 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:08,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:08:08,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:08,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2047244748, now seen corresponding path program 4 times [2022-01-31 19:08:08,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:08,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474928901] [2022-01-31 19:08:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:08,979 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:08,980 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:08,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:08,981 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:09,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:09,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:09,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474928901] [2022-01-31 19:08:09,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474928901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:09,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:09,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 19:08:09,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617982176] [2022-01-31 19:08:09,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:09,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 19:08:09,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:09,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 19:08:09,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:08:09,040 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:09,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:09,130 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2022-01-31 19:08:09,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 19:08:09,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 19:08:09,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:09,131 INFO L225 Difference]: With dead ends: 75 [2022-01-31 19:08:09,131 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 19:08:09,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:08:09,132 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 79 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:09,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 33 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 19:08:09,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-01-31 19:08:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-01-31 19:08:09,138 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 36 [2022-01-31 19:08:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:09,138 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-01-31 19:08:09,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-01-31 19:08:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 19:08:09,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:09,139 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:09,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:08:09,140 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:09,140 INFO L85 PathProgramCache]: Analyzing trace with hash -730311967, now seen corresponding path program 5 times [2022-01-31 19:08:09,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:09,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953857751] [2022-01-31 19:08:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:09,142 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:09,142 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:09,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:09,143 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:09,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:09,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:09,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953857751] [2022-01-31 19:08:09,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [953857751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:09,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:09,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 19:08:09,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401887794] [2022-01-31 19:08:09,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:09,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 19:08:09,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:09,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 19:08:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 19:08:09,208 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:09,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:09,321 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-01-31 19:08:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 19:08:09,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 19:08:09,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:09,322 INFO L225 Difference]: With dead ends: 83 [2022-01-31 19:08:09,322 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 19:08:09,322 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 19:08:09,323 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:09,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 38 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 19:08:09,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-01-31 19:08:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-01-31 19:08:09,329 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 41 [2022-01-31 19:08:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:09,329 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-01-31 19:08:09,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-01-31 19:08:09,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 19:08:09,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:09,330 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:09,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:08:09,330 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:09,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1138200272, now seen corresponding path program 6 times [2022-01-31 19:08:09,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:09,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153836896] [2022-01-31 19:08:09,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:09,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:09,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:09,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:09,333 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:09,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:09,399 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153836896] [2022-01-31 19:08:09,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [153836896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:09,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:09,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:08:09,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214771292] [2022-01-31 19:08:09,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:09,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:08:09,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:09,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:08:09,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:08:09,400 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:09,520 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2022-01-31 19:08:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 19:08:09,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 19:08:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:09,521 INFO L225 Difference]: With dead ends: 91 [2022-01-31 19:08:09,522 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 19:08:09,522 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 19:08:09,522 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 98 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:09,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 33 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 19:08:09,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-01-31 19:08:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:09,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-01-31 19:08:09,528 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 46 [2022-01-31 19:08:09,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:09,528 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-01-31 19:08:09,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:09,529 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-01-31 19:08:09,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 19:08:09,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:09,529 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:09,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:08:09,529 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash 496698237, now seen corresponding path program 7 times [2022-01-31 19:08:09,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:09,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586178573] [2022-01-31 19:08:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:09,533 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:09,533 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:09,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:09,535 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:09,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:09,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:09,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586178573] [2022-01-31 19:08:09,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [586178573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:09,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:09,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 19:08:09,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541377084] [2022-01-31 19:08:09,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:09,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 19:08:09,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 19:08:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 19:08:09,638 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:09,798 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2022-01-31 19:08:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:08:09,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 19:08:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:09,799 INFO L225 Difference]: With dead ends: 99 [2022-01-31 19:08:09,799 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 19:08:09,799 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 19:08:09,799 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 112 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:09,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 38 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 19:08:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2022-01-31 19:08:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-01-31 19:08:09,806 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 51 [2022-01-31 19:08:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:09,806 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-01-31 19:08:09,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-01-31 19:08:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 19:08:09,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:09,807 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:09,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:08:09,807 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:09,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:09,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1873303404, now seen corresponding path program 8 times [2022-01-31 19:08:09,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:09,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640232523] [2022-01-31 19:08:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:09,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:09,809 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:09,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:09,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:09,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:09,890 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:09,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640232523] [2022-01-31 19:08:09,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [640232523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:09,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:09,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:08:09,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614352612] [2022-01-31 19:08:09,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:09,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:08:09,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:09,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:08:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:08:09,891 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:10,077 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2022-01-31 19:08:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:08:10,077 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 19:08:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:10,078 INFO L225 Difference]: With dead ends: 107 [2022-01-31 19:08:10,078 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 19:08:10,078 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 19:08:10,079 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 114 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:10,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 43 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 19:08:10,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2022-01-31 19:08:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-01-31 19:08:10,085 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 56 [2022-01-31 19:08:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:10,085 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-01-31 19:08:10,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:10,085 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-01-31 19:08:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 19:08:10,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:10,086 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:10,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:08:10,086 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash -915188711, now seen corresponding path program 9 times [2022-01-31 19:08:10,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:10,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307646457] [2022-01-31 19:08:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:10,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:10,088 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:10,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:10,089 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:10,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:10,178 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:10,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307646457] [2022-01-31 19:08:10,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [307646457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:10,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:10,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 19:08:10,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314074417] [2022-01-31 19:08:10,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:10,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 19:08:10,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:10,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 19:08:10,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:08:10,179 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:10,351 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-01-31 19:08:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:08:10,352 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 19:08:10,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:10,352 INFO L225 Difference]: With dead ends: 115 [2022-01-31 19:08:10,352 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 19:08:10,353 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 19:08:10,353 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 140 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:10,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 38 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:10,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 19:08:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-01-31 19:08:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-01-31 19:08:10,360 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 61 [2022-01-31 19:08:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:10,360 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-01-31 19:08:10,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-01-31 19:08:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 19:08:10,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:10,361 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:10,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:08:10,361 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:10,361 INFO L85 PathProgramCache]: Analyzing trace with hash 258891768, now seen corresponding path program 10 times [2022-01-31 19:08:10,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:10,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579014791] [2022-01-31 19:08:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:10,363 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:10,363 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:10,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:10,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:10,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:10,465 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:10,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579014791] [2022-01-31 19:08:10,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [579014791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:10,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:10,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:08:10,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375143004] [2022-01-31 19:08:10,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:10,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:08:10,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:10,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:08:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:08:10,466 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:10,660 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2022-01-31 19:08:10,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:08:10,660 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 19:08:10,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:10,661 INFO L225 Difference]: With dead ends: 123 [2022-01-31 19:08:10,661 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 19:08:10,661 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 19:08:10,662 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 139 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:10,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 43 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 19:08:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-01-31 19:08:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2022-01-31 19:08:10,668 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 66 [2022-01-31 19:08:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:10,669 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2022-01-31 19:08:10,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2022-01-31 19:08:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 19:08:10,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:10,669 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:10,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:08:10,670 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:10,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:10,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1645804363, now seen corresponding path program 11 times [2022-01-31 19:08:10,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:10,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432183874] [2022-01-31 19:08:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:10,680 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:10,680 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:10,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:10,681 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:10,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:10,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:10,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432183874] [2022-01-31 19:08:10,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432183874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:10,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:10,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 19:08:10,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662046210] [2022-01-31 19:08:10,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:10,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 19:08:10,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 19:08:10,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:08:10,795 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:10,998 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2022-01-31 19:08:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:08:10,998 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 19:08:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:10,999 INFO L225 Difference]: With dead ends: 131 [2022-01-31 19:08:10,999 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 19:08:10,999 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 19:08:11,000 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 156 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:11,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 38 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 19:08:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2022-01-31 19:08:11,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 75 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-01-31 19:08:11,007 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 71 [2022-01-31 19:08:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:11,007 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-01-31 19:08:11,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-01-31 19:08:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 19:08:11,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:11,008 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:11,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:08:11,008 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:11,008 INFO L85 PathProgramCache]: Analyzing trace with hash -842606756, now seen corresponding path program 12 times [2022-01-31 19:08:11,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:11,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818717431] [2022-01-31 19:08:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:11,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:11,010 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:11,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:11,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:11,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:11,137 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 19:08:11,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:11,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818717431] [2022-01-31 19:08:11,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [818717431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:11,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:11,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:08:11,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924641459] [2022-01-31 19:08:11,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:11,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:08:11,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:11,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:08:11,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:08:11,138 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:11,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:11,357 INFO L93 Difference]: Finished difference Result 139 states and 172 transitions. [2022-01-31 19:08:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:08:11,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 19:08:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:11,358 INFO L225 Difference]: With dead ends: 139 [2022-01-31 19:08:11,358 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 19:08:11,358 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 19:08:11,359 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 173 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:11,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 38 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:11,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 19:08:11,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-01-31 19:08:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-01-31 19:08:11,366 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 76 [2022-01-31 19:08:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:11,366 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-01-31 19:08:11,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-01-31 19:08:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 19:08:11,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:11,367 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:11,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:08:11,367 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:11,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:11,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1935398225, now seen corresponding path program 13 times [2022-01-31 19:08:11,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:11,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426671781] [2022-01-31 19:08:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:11,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:11,369 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:11,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:11,370 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:11,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:11,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:11,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426671781] [2022-01-31 19:08:11,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [426671781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:11,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:11,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 19:08:11,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215533558] [2022-01-31 19:08:11,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:11,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 19:08:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 19:08:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 19:08:11,514 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:11,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:11,760 INFO L93 Difference]: Finished difference Result 147 states and 182 transitions. [2022-01-31 19:08:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:08:11,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 19:08:11,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:11,761 INFO L225 Difference]: With dead ends: 147 [2022-01-31 19:08:11,761 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 19:08:11,761 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 19:08:11,761 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 187 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:11,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 43 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 19:08:11,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-01-31 19:08:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2022-01-31 19:08:11,769 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 81 [2022-01-31 19:08:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:11,769 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2022-01-31 19:08:11,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2022-01-31 19:08:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 19:08:11,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:11,769 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:11,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:08:11,770 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1086632256, now seen corresponding path program 14 times [2022-01-31 19:08:11,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:11,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227307975] [2022-01-31 19:08:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:11,772 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:11,772 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:11,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:11,773 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:11,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:11,915 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:11,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227307975] [2022-01-31 19:08:11,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [227307975] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:11,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:11,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:08:11,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091788227] [2022-01-31 19:08:11,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:11,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:08:11,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:08:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:08:11,916 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:12,169 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2022-01-31 19:08:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:08:12,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 19:08:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:12,169 INFO L225 Difference]: With dead ends: 155 [2022-01-31 19:08:12,170 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 19:08:12,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:08:12,170 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 189 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:12,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 43 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 19:08:12,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-01-31 19:08:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.211111111111111) internal successors, (109), 90 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2022-01-31 19:08:12,178 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 86 [2022-01-31 19:08:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:12,178 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2022-01-31 19:08:12,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:12,179 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2022-01-31 19:08:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 19:08:12,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:12,179 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:12,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:08:12,179 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:12,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1354204653, now seen corresponding path program 15 times [2022-01-31 19:08:12,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:12,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408977073] [2022-01-31 19:08:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:12,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:12,181 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:12,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:12,182 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:12,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:12,317 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 19:08:12,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:12,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408977073] [2022-01-31 19:08:12,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1408977073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:12,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:12,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 19:08:12,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145578582] [2022-01-31 19:08:12,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:12,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 19:08:12,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:12,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 19:08:12,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:08:12,318 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:12,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:12,620 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2022-01-31 19:08:12,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:08:12,621 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 19:08:12,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:12,621 INFO L225 Difference]: With dead ends: 163 [2022-01-31 19:08:12,621 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 19:08:12,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:08:12,622 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 194 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:12,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 53 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:12,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 19:08:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2022-01-31 19:08:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2022-01-31 19:08:12,633 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 91 [2022-01-31 19:08:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:12,633 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2022-01-31 19:08:12,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:12,634 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2022-01-31 19:08:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 19:08:12,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:12,634 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:12,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:08:12,634 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:12,651 INFO L85 PathProgramCache]: Analyzing trace with hash 455476772, now seen corresponding path program 16 times [2022-01-31 19:08:12,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:12,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093001032] [2022-01-31 19:08:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:12,654 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:12,654 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:12,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:12,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:12,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:12,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:12,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093001032] [2022-01-31 19:08:12,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1093001032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:12,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:12,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:08:12,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583915704] [2022-01-31 19:08:12,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:12,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:08:12,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:12,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:08:12,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:08:12,857 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:13,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:13,147 INFO L93 Difference]: Finished difference Result 171 states and 212 transitions. [2022-01-31 19:08:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:08:13,148 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-01-31 19:08:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:13,148 INFO L225 Difference]: With dead ends: 171 [2022-01-31 19:08:13,149 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 19:08:13,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:08:13,149 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 223 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:13,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 33 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 19:08:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2022-01-31 19:08:13,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.21) internal successors, (121), 100 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2022-01-31 19:08:13,158 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 96 [2022-01-31 19:08:13,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:13,158 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2022-01-31 19:08:13,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:13,158 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2022-01-31 19:08:13,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 19:08:13,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:13,160 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:13,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:08:13,161 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:13,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:13,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2023762295, now seen corresponding path program 17 times [2022-01-31 19:08:13,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:13,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326837084] [2022-01-31 19:08:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:13,163 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:13,163 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:13,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:13,165 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:13,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:13,342 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 19:08:13,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:13,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326837084] [2022-01-31 19:08:13,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [326837084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:13,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:13,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 19:08:13,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228051252] [2022-01-31 19:08:13,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:13,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 19:08:13,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:13,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 19:08:13,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:08:13,343 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:13,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:13,735 INFO L93 Difference]: Finished difference Result 179 states and 222 transitions. [2022-01-31 19:08:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:08:13,735 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 19:08:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:13,737 INFO L225 Difference]: With dead ends: 179 [2022-01-31 19:08:13,737 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 19:08:13,737 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 19:08:13,738 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 270 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:13,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 38 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 19:08:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2022-01-31 19:08:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 105 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:13,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2022-01-31 19:08:13,750 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 101 [2022-01-31 19:08:13,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:13,750 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2022-01-31 19:08:13,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:13,750 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2022-01-31 19:08:13,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 19:08:13,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:13,751 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:13,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:08:13,751 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1080114568, now seen corresponding path program 18 times [2022-01-31 19:08:13,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:13,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099845699] [2022-01-31 19:08:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:13,754 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:13,754 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:13,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:13,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:13,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:13,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:13,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099845699] [2022-01-31 19:08:13,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1099845699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:13,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:13,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:08:13,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399720357] [2022-01-31 19:08:13,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:13,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:08:13,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:13,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:08:13,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:08:13,962 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:14,296 INFO L93 Difference]: Finished difference Result 187 states and 232 transitions. [2022-01-31 19:08:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:08:14,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-31 19:08:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:14,297 INFO L225 Difference]: With dead ends: 187 [2022-01-31 19:08:14,297 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 19:08:14,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:08:14,298 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 287 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:14,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 38 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 19:08:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-01-31 19:08:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.209090909090909) internal successors, (133), 110 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2022-01-31 19:08:14,308 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 106 [2022-01-31 19:08:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:14,308 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2022-01-31 19:08:14,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2022-01-31 19:08:14,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 19:08:14,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:14,309 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:14,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:08:14,309 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:14,309 INFO L85 PathProgramCache]: Analyzing trace with hash -818247899, now seen corresponding path program 19 times [2022-01-31 19:08:14,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:14,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697185727] [2022-01-31 19:08:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:14,311 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:14,311 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:14,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:14,312 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:14,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:14,533 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:14,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697185727] [2022-01-31 19:08:14,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [697185727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:14,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:14,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 19:08:14,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779332391] [2022-01-31 19:08:14,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:14,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 19:08:14,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:14,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 19:08:14,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:08:14,535 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:14,893 INFO L93 Difference]: Finished difference Result 195 states and 242 transitions. [2022-01-31 19:08:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:08:14,894 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 19:08:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:14,894 INFO L225 Difference]: With dead ends: 195 [2022-01-31 19:08:14,894 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 19:08:14,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:08:14,895 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 334 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:14,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 28 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 19:08:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2022-01-31 19:08:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 115 states have (on average 1.208695652173913) internal successors, (139), 115 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-01-31 19:08:14,908 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 111 [2022-01-31 19:08:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:14,909 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-01-31 19:08:14,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-01-31 19:08:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 19:08:14,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:14,909 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:14,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:08:14,910 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:14,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1723386644, now seen corresponding path program 20 times [2022-01-31 19:08:14,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:14,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986300504] [2022-01-31 19:08:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:14,912 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:14,912 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:14,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:14,915 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:15,143 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:15,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986300504] [2022-01-31 19:08:15,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [986300504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:15,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:15,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:08:15,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102816889] [2022-01-31 19:08:15,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:15,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:08:15,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:15,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:08:15,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:08:15,144 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:15,517 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2022-01-31 19:08:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:08:15,517 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-01-31 19:08:15,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:15,518 INFO L225 Difference]: With dead ends: 203 [2022-01-31 19:08:15,518 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 19:08:15,518 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 19:08:15,519 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 297 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:15,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 38 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:15,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 19:08:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2022-01-31 19:08:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.2083333333333333) internal successors, (145), 120 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 150 transitions. [2022-01-31 19:08:15,530 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 150 transitions. Word has length 116 [2022-01-31 19:08:15,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:15,530 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 150 transitions. [2022-01-31 19:08:15,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 150 transitions. [2022-01-31 19:08:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 19:08:15,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:15,531 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:15,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:08:15,532 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:15,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1655527361, now seen corresponding path program 21 times [2022-01-31 19:08:15,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:15,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849357419] [2022-01-31 19:08:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:15,533 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:15,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:15,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:15,535 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:15,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:15,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849357419] [2022-01-31 19:08:15,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [849357419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:15,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:15,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 19:08:15,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38507817] [2022-01-31 19:08:15,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:15,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 19:08:15,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:15,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 19:08:15,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:08:15,780 INFO L87 Difference]: Start difference. First operand 126 states and 150 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:16,097 INFO L93 Difference]: Finished difference Result 211 states and 262 transitions. [2022-01-31 19:08:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:08:16,097 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-01-31 19:08:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:16,098 INFO L225 Difference]: With dead ends: 211 [2022-01-31 19:08:16,098 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 19:08:16,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:08:16,099 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 308 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:16,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 38 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 19:08:16,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2022-01-31 19:08:16,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 125 states have (on average 1.208) internal successors, (151), 125 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2022-01-31 19:08:16,111 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 121 [2022-01-31 19:08:16,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:16,111 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2022-01-31 19:08:16,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2022-01-31 19:08:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 19:08:16,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:16,112 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:16,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:08:16,112 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:16,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2142383184, now seen corresponding path program 22 times [2022-01-31 19:08:16,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:16,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134560025] [2022-01-31 19:08:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:16,114 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:16,114 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:16,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:16,115 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:16,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:16,391 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:16,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134560025] [2022-01-31 19:08:16,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1134560025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:16,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:16,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:08:16,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174883422] [2022-01-31 19:08:16,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:16,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:08:16,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:16,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:08:16,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:08:16,392 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:16,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:16,830 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2022-01-31 19:08:16,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:08:16,831 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-01-31 19:08:16,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:16,831 INFO L225 Difference]: With dead ends: 219 [2022-01-31 19:08:16,832 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 19:08:16,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:08:16,833 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 313 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:16,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 43 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 19:08:16,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2022-01-31 19:08:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 130 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 162 transitions. [2022-01-31 19:08:16,851 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 162 transitions. Word has length 126 [2022-01-31 19:08:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:16,851 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 162 transitions. [2022-01-31 19:08:16,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 162 transitions. [2022-01-31 19:08:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 19:08:16,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:16,852 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:16,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:08:16,852 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:16,853 INFO L85 PathProgramCache]: Analyzing trace with hash 446564445, now seen corresponding path program 23 times [2022-01-31 19:08:16,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:16,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083304457] [2022-01-31 19:08:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:16,854 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:16,855 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:16,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:16,857 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:17,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:17,133 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 19:08:17,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:17,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083304457] [2022-01-31 19:08:17,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2083304457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:17,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:17,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 19:08:17,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271695560] [2022-01-31 19:08:17,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:17,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 19:08:17,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:17,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 19:08:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:08:17,135 INFO L87 Difference]: Start difference. First operand 136 states and 162 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:17,580 INFO L93 Difference]: Finished difference Result 227 states and 282 transitions. [2022-01-31 19:08:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:08:17,580 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 19:08:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:17,581 INFO L225 Difference]: With dead ends: 227 [2022-01-31 19:08:17,581 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 19:08:17,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:08:17,586 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 357 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:17,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 38 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:17,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 19:08:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-01-31 19:08:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 135 states have (on average 1.2074074074074075) internal successors, (163), 135 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2022-01-31 19:08:17,609 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 131 [2022-01-31 19:08:17,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:17,609 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2022-01-31 19:08:17,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:17,610 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2022-01-31 19:08:17,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 19:08:17,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:17,610 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:17,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:08:17,611 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:17,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:17,611 INFO L85 PathProgramCache]: Analyzing trace with hash 553411508, now seen corresponding path program 24 times [2022-01-31 19:08:17,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:17,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004284878] [2022-01-31 19:08:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:17,615 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:17,615 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:17,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:17,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:17,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:17,924 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004284878] [2022-01-31 19:08:17,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004284878] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:17,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:17,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:08:17,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34199330] [2022-01-31 19:08:17,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:17,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:08:17,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:08:17,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:08:17,927 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:18,339 INFO L93 Difference]: Finished difference Result 235 states and 292 transitions. [2022-01-31 19:08:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:08:18,340 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-01-31 19:08:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:18,340 INFO L225 Difference]: With dead ends: 235 [2022-01-31 19:08:18,340 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 19:08:18,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:08:18,342 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 341 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:18,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 43 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 19:08:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2022-01-31 19:08:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.207142857142857) internal successors, (169), 140 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2022-01-31 19:08:18,356 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 136 [2022-01-31 19:08:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:18,357 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2022-01-31 19:08:18,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2022-01-31 19:08:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 19:08:18,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:18,357 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:18,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:08:18,358 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:18,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1972217607, now seen corresponding path program 25 times [2022-01-31 19:08:18,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:18,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474932094] [2022-01-31 19:08:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:18,361 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:18,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:18,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:18,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:18,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:18,690 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474932094] [2022-01-31 19:08:18,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474932094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:18,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:18,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 19:08:18,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524929932] [2022-01-31 19:08:18,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:18,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 19:08:18,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 19:08:18,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:08:18,691 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:19,231 INFO L93 Difference]: Finished difference Result 243 states and 302 transitions. [2022-01-31 19:08:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:08:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 19:08:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:19,232 INFO L225 Difference]: With dead ends: 243 [2022-01-31 19:08:19,232 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 19:08:19,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:08:19,234 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 391 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:19,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 33 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 19:08:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2022-01-31 19:08:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 145 states have (on average 1.206896551724138) internal successors, (175), 145 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2022-01-31 19:08:19,249 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 141 [2022-01-31 19:08:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:19,249 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2022-01-31 19:08:19,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2022-01-31 19:08:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 19:08:19,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:19,250 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:19,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:08:19,250 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:19,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:19,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1644174104, now seen corresponding path program 26 times [2022-01-31 19:08:19,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:19,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094123912] [2022-01-31 19:08:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:19,252 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:19,252 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:19,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:19,255 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:19,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:19,577 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:19,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094123912] [2022-01-31 19:08:19,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094123912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:19,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:19,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:08:19,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794407602] [2022-01-31 19:08:19,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:19,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:08:19,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:19,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:08:19,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:08:19,578 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:20,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:20,125 INFO L93 Difference]: Finished difference Result 251 states and 312 transitions. [2022-01-31 19:08:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:08:20,125 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-01-31 19:08:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:20,126 INFO L225 Difference]: With dead ends: 251 [2022-01-31 19:08:20,126 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 19:08:20,127 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 19:08:20,127 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 435 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:20,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 38 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 19:08:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2022-01-31 19:08:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.2066666666666668) internal successors, (181), 150 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 186 transitions. [2022-01-31 19:08:20,166 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 186 transitions. Word has length 146 [2022-01-31 19:08:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:20,167 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 186 transitions. [2022-01-31 19:08:20,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 186 transitions. [2022-01-31 19:08:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 19:08:20,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:20,167 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:20,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:08:20,168 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:20,168 INFO L85 PathProgramCache]: Analyzing trace with hash 470813077, now seen corresponding path program 27 times [2022-01-31 19:08:20,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:20,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203304347] [2022-01-31 19:08:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:20,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:20,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:20,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:20,172 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:20,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:20,519 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:20,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203304347] [2022-01-31 19:08:20,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203304347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:20,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:20,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 19:08:20,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402387914] [2022-01-31 19:08:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:20,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 19:08:20,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 19:08:20,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:08:20,521 INFO L87 Difference]: Start difference. First operand 156 states and 186 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:21,105 INFO L93 Difference]: Finished difference Result 259 states and 322 transitions. [2022-01-31 19:08:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:08:21,106 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 19:08:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:21,106 INFO L225 Difference]: With dead ends: 259 [2022-01-31 19:08:21,106 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 19:08:21,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:08:21,108 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 476 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:21,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 38 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:21,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 19:08:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2022-01-31 19:08:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 155 states have (on average 1.206451612903226) internal successors, (187), 155 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2022-01-31 19:08:21,125 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 151 [2022-01-31 19:08:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:21,125 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2022-01-31 19:08:21,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2022-01-31 19:08:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 19:08:21,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:21,126 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:21,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:08:21,126 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:21,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1021865348, now seen corresponding path program 28 times [2022-01-31 19:08:21,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:21,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336870007] [2022-01-31 19:08:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:21,128 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:21,128 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:21,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:21,131 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:21,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:21,553 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 19:08:21,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:21,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336870007] [2022-01-31 19:08:21,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [336870007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:21,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:21,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:08:21,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302212596] [2022-01-31 19:08:21,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:21,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:08:21,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:21,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:08:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:08:21,555 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:22,135 INFO L93 Difference]: Finished difference Result 267 states and 332 transitions. [2022-01-31 19:08:22,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:08:22,136 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-01-31 19:08:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:22,136 INFO L225 Difference]: With dead ends: 267 [2022-01-31 19:08:22,136 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 19:08:22,137 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 19:08:22,138 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 499 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:22,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 33 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 19:08:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2022-01-31 19:08:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.20625) internal successors, (193), 160 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 198 transitions. [2022-01-31 19:08:22,156 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 198 transitions. Word has length 156 [2022-01-31 19:08:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:22,156 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 198 transitions. [2022-01-31 19:08:22,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 198 transitions. [2022-01-31 19:08:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 19:08:22,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:22,157 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:22,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:08:22,157 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:22,158 INFO L85 PathProgramCache]: Analyzing trace with hash 735894065, now seen corresponding path program 29 times [2022-01-31 19:08:22,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:22,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671405509] [2022-01-31 19:08:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:22,159 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:22,159 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:22,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:22,162 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:22,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:22,550 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:22,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671405509] [2022-01-31 19:08:22,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [671405509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:22,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:22,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 19:08:22,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781872001] [2022-01-31 19:08:22,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:22,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 19:08:22,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:22,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 19:08:22,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:08:22,552 INFO L87 Difference]: Start difference. First operand 166 states and 198 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:23,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:23,215 INFO L93 Difference]: Finished difference Result 275 states and 342 transitions. [2022-01-31 19:08:23,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:08:23,215 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 19:08:23,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:23,216 INFO L225 Difference]: With dead ends: 275 [2022-01-31 19:08:23,216 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 19:08:23,217 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 19:08:23,217 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 486 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:23,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 38 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:23,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 19:08:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2022-01-31 19:08:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 165 states have (on average 1.206060606060606) internal successors, (199), 165 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 204 transitions. [2022-01-31 19:08:23,236 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 204 transitions. Word has length 161 [2022-01-31 19:08:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:23,236 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 204 transitions. [2022-01-31 19:08:23,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:23,236 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 204 transitions. [2022-01-31 19:08:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 19:08:23,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:23,237 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:23,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:08:23,237 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:23,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1142753760, now seen corresponding path program 30 times [2022-01-31 19:08:23,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:23,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768698020] [2022-01-31 19:08:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:23,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:23,239 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:23,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:23,242 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:23,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:23,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:23,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768698020] [2022-01-31 19:08:23,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [768698020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:23,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:23,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:08:23,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394124710] [2022-01-31 19:08:23,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:23,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:08:23,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:23,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:08:23,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:08:23,653 INFO L87 Difference]: Start difference. First operand 171 states and 204 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:24,340 INFO L93 Difference]: Finished difference Result 283 states and 352 transitions. [2022-01-31 19:08:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 19:08:24,340 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-01-31 19:08:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:24,341 INFO L225 Difference]: With dead ends: 283 [2022-01-31 19:08:24,341 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 19:08:24,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:08:24,342 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 470 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:24,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 38 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 19:08:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2022-01-31 19:08:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.2058823529411764) internal successors, (205), 170 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 210 transitions. [2022-01-31 19:08:24,363 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 210 transitions. Word has length 166 [2022-01-31 19:08:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:24,363 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 210 transitions. [2022-01-31 19:08:24,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 210 transitions. [2022-01-31 19:08:24,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 19:08:24,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:24,364 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:24,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:08:24,364 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:24,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:24,365 INFO L85 PathProgramCache]: Analyzing trace with hash 616467149, now seen corresponding path program 31 times [2022-01-31 19:08:24,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:24,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976540392] [2022-01-31 19:08:24,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:24,366 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:24,366 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:24,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:24,369 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:24,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:24,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:24,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976540392] [2022-01-31 19:08:24,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [976540392] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:24,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:24,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 19:08:24,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593732629] [2022-01-31 19:08:24,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:24,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 19:08:24,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:24,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 19:08:24,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:08:24,836 INFO L87 Difference]: Start difference. First operand 176 states and 210 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:25,539 INFO L93 Difference]: Finished difference Result 291 states and 362 transitions. [2022-01-31 19:08:25,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:08:25,540 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 19:08:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:25,540 INFO L225 Difference]: With dead ends: 291 [2022-01-31 19:08:25,540 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 19:08:25,541 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 19:08:25,542 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 454 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:25,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 53 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 19:08:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2022-01-31 19:08:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.2057142857142857) internal successors, (211), 175 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2022-01-31 19:08:25,587 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 171 [2022-01-31 19:08:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:25,587 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2022-01-31 19:08:25,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:25,587 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2022-01-31 19:08:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 19:08:25,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:25,588 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:25,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:08:25,588 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:25,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:25,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1214955844, now seen corresponding path program 32 times [2022-01-31 19:08:25,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:25,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13853455] [2022-01-31 19:08:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:25,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:25,592 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:25,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:25,595 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:25,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:25,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:25,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13853455] [2022-01-31 19:08:25,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [13853455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:25,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:25,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:08:25,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785040152] [2022-01-31 19:08:25,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:25,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:08:25,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:25,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:08:25,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:08:25,923 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:26,377 INFO L93 Difference]: Finished difference Result 299 states and 372 transitions. [2022-01-31 19:08:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:08:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-01-31 19:08:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:26,378 INFO L225 Difference]: With dead ends: 299 [2022-01-31 19:08:26,378 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 19:08:26,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:08:26,380 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 477 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:26,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 33 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:08:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 19:08:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2022-01-31 19:08:26,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.2055555555555555) internal successors, (217), 180 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 222 transitions. [2022-01-31 19:08:26,403 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 222 transitions. Word has length 176 [2022-01-31 19:08:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:26,403 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 222 transitions. [2022-01-31 19:08:26,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:26,403 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 222 transitions. [2022-01-31 19:08:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 19:08:26,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:26,404 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:26,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:08:26,404 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:26,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:26,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1675961495, now seen corresponding path program 33 times [2022-01-31 19:08:26,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:26,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072821427] [2022-01-31 19:08:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:26,406 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:26,406 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:26,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:26,410 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:26,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:26,922 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:26,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072821427] [2022-01-31 19:08:26,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1072821427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:26,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:26,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:08:26,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726956864] [2022-01-31 19:08:26,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:26,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:08:26,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:08:26,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:08:26,923 INFO L87 Difference]: Start difference. First operand 186 states and 222 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:27,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:27,730 INFO L93 Difference]: Finished difference Result 307 states and 382 transitions. [2022-01-31 19:08:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 19:08:27,730 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-01-31 19:08:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:27,731 INFO L225 Difference]: With dead ends: 307 [2022-01-31 19:08:27,731 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 19:08:27,732 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 19:08:27,732 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 608 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:27,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 33 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:08:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 19:08:27,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2022-01-31 19:08:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 185 states have (on average 1.2054054054054053) internal successors, (223), 185 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 228 transitions. [2022-01-31 19:08:27,756 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 228 transitions. Word has length 181 [2022-01-31 19:08:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:27,756 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 228 transitions. [2022-01-31 19:08:27,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:27,756 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 228 transitions. [2022-01-31 19:08:27,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 19:08:27,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:27,757 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:27,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:08:27,757 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:27,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2061170856, now seen corresponding path program 34 times [2022-01-31 19:08:27,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:27,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097517495] [2022-01-31 19:08:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:27,759 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:27,759 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:27,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:27,764 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:28,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:28,250 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:28,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097517495] [2022-01-31 19:08:28,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2097517495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:28,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:28,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:08:28,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575417562] [2022-01-31 19:08:28,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:28,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:08:28,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:28,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:08:28,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:08:28,259 INFO L87 Difference]: Start difference. First operand 191 states and 228 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:28,956 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2022-01-31 19:08:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:08:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-01-31 19:08:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:28,960 INFO L225 Difference]: With dead ends: 315 [2022-01-31 19:08:28,961 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 19:08:28,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:08:28,962 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 463 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:28,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 58 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 19:08:28,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2022-01-31 19:08:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.2052631578947368) internal successors, (229), 190 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2022-01-31 19:08:29,004 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 186 [2022-01-31 19:08:29,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:29,004 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2022-01-31 19:08:29,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2022-01-31 19:08:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 19:08:29,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:29,005 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:29,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:08:29,005 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1842842629, now seen corresponding path program 35 times [2022-01-31 19:08:29,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:29,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592489756] [2022-01-31 19:08:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:29,007 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:29,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:29,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:29,010 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:29,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:29,517 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:29,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592489756] [2022-01-31 19:08:29,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592489756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:29,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:29,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 19:08:29,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655762946] [2022-01-31 19:08:29,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:29,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 19:08:29,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:29,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 19:08:29,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:08:29,519 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:30,149 INFO L93 Difference]: Finished difference Result 323 states and 402 transitions. [2022-01-31 19:08:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 19:08:30,149 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 19:08:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:30,150 INFO L225 Difference]: With dead ends: 323 [2022-01-31 19:08:30,150 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 19:08:30,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:08:30,152 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 465 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:30,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 58 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:30,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 19:08:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2022-01-31 19:08:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 195 states have (on average 1.205128205128205) internal successors, (235), 195 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 240 transitions. [2022-01-31 19:08:30,178 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 240 transitions. Word has length 191 [2022-01-31 19:08:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:30,178 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 240 transitions. [2022-01-31 19:08:30,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 240 transitions. [2022-01-31 19:08:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 19:08:30,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:30,179 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:30,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:08:30,179 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1312296948, now seen corresponding path program 36 times [2022-01-31 19:08:30,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:30,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294052980] [2022-01-31 19:08:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:30,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:30,182 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:30,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:30,185 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:30,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:30,745 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:30,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294052980] [2022-01-31 19:08:30,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294052980] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:30,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:30,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:08:30,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247177289] [2022-01-31 19:08:30,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:30,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:08:30,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:08:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:08:30,746 INFO L87 Difference]: Start difference. First operand 201 states and 240 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:31,451 INFO L93 Difference]: Finished difference Result 331 states and 412 transitions. [2022-01-31 19:08:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:08:31,451 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2022-01-31 19:08:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:31,452 INFO L225 Difference]: With dead ends: 331 [2022-01-31 19:08:31,452 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 19:08:31,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:08:31,453 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 665 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:31,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 33 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 19:08:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2022-01-31 19:08:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 200 states have (on average 1.205) internal successors, (241), 200 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2022-01-31 19:08:31,482 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 196 [2022-01-31 19:08:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:31,482 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2022-01-31 19:08:31,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2022-01-31 19:08:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 19:08:31,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:31,483 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:31,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:08:31,483 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:31,484 INFO L85 PathProgramCache]: Analyzing trace with hash -665166687, now seen corresponding path program 37 times [2022-01-31 19:08:31,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:31,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844758339] [2022-01-31 19:08:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:31,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:31,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:31,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:31,491 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:31,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:31,867 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844758339] [2022-01-31 19:08:31,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [844758339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:31,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:31,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 19:08:31,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786081155] [2022-01-31 19:08:31,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:31,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 19:08:31,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:31,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 19:08:31,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:08:31,868 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:32,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:32,533 INFO L93 Difference]: Finished difference Result 339 states and 422 transitions. [2022-01-31 19:08:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:08:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 19:08:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:32,538 INFO L225 Difference]: With dead ends: 339 [2022-01-31 19:08:32,539 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 19:08:32,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:08:32,541 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 574 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:32,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 38 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 19:08:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2022-01-31 19:08:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 205 states have (on average 1.2048780487804878) internal successors, (247), 205 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 252 transitions. [2022-01-31 19:08:32,573 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 252 transitions. Word has length 201 [2022-01-31 19:08:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:32,573 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 252 transitions. [2022-01-31 19:08:32,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 252 transitions. [2022-01-31 19:08:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 19:08:32,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:32,574 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:32,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:08:32,574 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:32,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:32,575 INFO L85 PathProgramCache]: Analyzing trace with hash -754194576, now seen corresponding path program 38 times [2022-01-31 19:08:32,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:32,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68031498] [2022-01-31 19:08:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:32,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:32,577 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:32,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:32,580 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:33,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:33,186 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:33,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68031498] [2022-01-31 19:08:33,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [68031498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:33,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:33,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:08:33,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584749827] [2022-01-31 19:08:33,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:33,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:08:33,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:08:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:08:33,188 INFO L87 Difference]: Start difference. First operand 211 states and 252 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:34,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:34,159 INFO L93 Difference]: Finished difference Result 347 states and 432 transitions. [2022-01-31 19:08:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:08:34,160 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-01-31 19:08:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:34,160 INFO L225 Difference]: With dead ends: 347 [2022-01-31 19:08:34,160 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 19:08:34,162 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 19:08:34,162 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 558 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:34,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 53 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:08:34,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 19:08:34,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2022-01-31 19:08:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.2047619047619047) internal successors, (253), 210 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 258 transitions. [2022-01-31 19:08:34,213 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 258 transitions. Word has length 206 [2022-01-31 19:08:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:34,214 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 258 transitions. [2022-01-31 19:08:34,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 258 transitions. [2022-01-31 19:08:34,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 19:08:34,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:34,215 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:34,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:08:34,215 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:34,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:34,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1735848643, now seen corresponding path program 39 times [2022-01-31 19:08:34,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:34,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982283012] [2022-01-31 19:08:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:34,217 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:34,217 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:34,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:34,221 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:34,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:34,728 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 19:08:34,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:34,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982283012] [2022-01-31 19:08:34,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [982283012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:34,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:34,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 19:08:34,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359902961] [2022-01-31 19:08:34,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:34,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 19:08:34,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 19:08:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:08:34,743 INFO L87 Difference]: Start difference. First operand 216 states and 258 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:35,653 INFO L93 Difference]: Finished difference Result 355 states and 442 transitions. [2022-01-31 19:08:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:08:35,653 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 19:08:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:35,654 INFO L225 Difference]: With dead ends: 355 [2022-01-31 19:08:35,654 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 19:08:35,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:08:35,655 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 617 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:35,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 33 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:08:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 19:08:35,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2022-01-31 19:08:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 215 states have (on average 1.2046511627906977) internal successors, (259), 215 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 264 transitions. [2022-01-31 19:08:35,712 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 264 transitions. Word has length 211 [2022-01-31 19:08:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:35,712 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 264 transitions. [2022-01-31 19:08:35,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 264 transitions. [2022-01-31 19:08:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 19:08:35,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:35,713 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:35,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:08:35,713 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:35,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1207886124, now seen corresponding path program 40 times [2022-01-31 19:08:35,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:35,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761028264] [2022-01-31 19:08:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:35,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:35,715 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:35,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:35,722 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:36,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:36,380 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 19:08:36,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:36,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761028264] [2022-01-31 19:08:36,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [761028264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:36,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:36,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:08:36,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667195333] [2022-01-31 19:08:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:36,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:08:36,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:08:36,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:08:36,382 INFO L87 Difference]: Start difference. First operand 221 states and 264 transitions. Second operand has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:37,233 INFO L93 Difference]: Finished difference Result 363 states and 452 transitions. [2022-01-31 19:08:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:08:37,233 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2022-01-31 19:08:37,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:37,234 INFO L225 Difference]: With dead ends: 363 [2022-01-31 19:08:37,234 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 19:08:37,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:08:37,235 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 622 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:37,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 38 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 19:08:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2022-01-31 19:08:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.2045454545454546) internal successors, (265), 220 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 270 transitions. [2022-01-31 19:08:37,267 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 270 transitions. Word has length 216 [2022-01-31 19:08:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:37,268 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 270 transitions. [2022-01-31 19:08:37,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 270 transitions. [2022-01-31 19:08:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 19:08:37,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:37,268 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:37,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:08:37,269 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash 97082841, now seen corresponding path program 41 times [2022-01-31 19:08:37,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:37,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185649700] [2022-01-31 19:08:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:37,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:37,271 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:37,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:37,275 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:37,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:37,792 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:37,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185649700] [2022-01-31 19:08:37,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1185649700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:37,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:37,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 19:08:37,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847199151] [2022-01-31 19:08:37,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:37,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 19:08:37,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:37,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 19:08:37,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:08:37,794 INFO L87 Difference]: Start difference. First operand 226 states and 270 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:38,567 INFO L93 Difference]: Finished difference Result 371 states and 462 transitions. [2022-01-31 19:08:38,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:08:38,568 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-01-31 19:08:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:38,569 INFO L225 Difference]: With dead ends: 371 [2022-01-31 19:08:38,569 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 19:08:38,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:08:38,570 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 657 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:38,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 43 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 19:08:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2022-01-31 19:08:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 225 states have (on average 1.2044444444444444) internal successors, (271), 225 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 276 transitions. [2022-01-31 19:08:38,619 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 276 transitions. Word has length 221 [2022-01-31 19:08:38,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:38,619 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 276 transitions. [2022-01-31 19:08:38,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 276 transitions. [2022-01-31 19:08:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 19:08:38,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:38,621 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:38,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:08:38,621 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash 293721656, now seen corresponding path program 42 times [2022-01-31 19:08:38,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:38,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862853291] [2022-01-31 19:08:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:38,623 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:38,624 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:38,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:38,628 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:39,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:39,335 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 19:08:39,335 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:39,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862853291] [2022-01-31 19:08:39,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [862853291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:39,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:39,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 19:08:39,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233254478] [2022-01-31 19:08:39,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:39,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 19:08:39,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:39,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 19:08:39,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:08:39,337 INFO L87 Difference]: Start difference. First operand 231 states and 276 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:40,118 INFO L93 Difference]: Finished difference Result 379 states and 472 transitions. [2022-01-31 19:08:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:08:40,118 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2022-01-31 19:08:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:40,119 INFO L225 Difference]: With dead ends: 379 [2022-01-31 19:08:40,119 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 19:08:40,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 19:08:40,119 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 689 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:40,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 48 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 19:08:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2022-01-31 19:08:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.2043478260869565) internal successors, (277), 230 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 282 transitions. [2022-01-31 19:08:40,154 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 282 transitions. Word has length 226 [2022-01-31 19:08:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:40,155 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 282 transitions. [2022-01-31 19:08:40,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 282 transitions. [2022-01-31 19:08:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 19:08:40,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:40,156 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:40,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:08:40,156 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash 771821173, now seen corresponding path program 43 times [2022-01-31 19:08:40,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:40,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97570398] [2022-01-31 19:08:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:40,159 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:40,159 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:40,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:40,163 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:40,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:40,969 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:40,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97570398] [2022-01-31 19:08:40,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [97570398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:40,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:40,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 19:08:40,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116986716] [2022-01-31 19:08:40,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:40,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 19:08:40,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:40,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 19:08:40,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:08:40,970 INFO L87 Difference]: Start difference. First operand 236 states and 282 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:41,881 INFO L93 Difference]: Finished difference Result 387 states and 482 transitions. [2022-01-31 19:08:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:08:41,881 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 19:08:41,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:41,882 INFO L225 Difference]: With dead ends: 387 [2022-01-31 19:08:41,882 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 19:08:41,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:08:41,883 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 709 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:41,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 33 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 19:08:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2022-01-31 19:08:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 235 states have (on average 1.2042553191489362) internal successors, (283), 235 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 288 transitions. [2022-01-31 19:08:41,920 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 288 transitions. Word has length 231 [2022-01-31 19:08:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:41,920 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 288 transitions. [2022-01-31 19:08:41,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 288 transitions. [2022-01-31 19:08:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-31 19:08:41,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:41,921 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:41,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:08:41,921 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1273515420, now seen corresponding path program 44 times [2022-01-31 19:08:41,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:41,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541385606] [2022-01-31 19:08:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:41,923 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:41,924 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:41,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:41,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:42,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:42,692 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:42,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541385606] [2022-01-31 19:08:42,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [541385606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:42,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:42,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 19:08:42,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759514707] [2022-01-31 19:08:42,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:42,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 19:08:42,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:42,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 19:08:42,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:08:42,694 INFO L87 Difference]: Start difference. First operand 241 states and 288 transitions. Second operand has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:43,766 INFO L93 Difference]: Finished difference Result 395 states and 492 transitions. [2022-01-31 19:08:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 19:08:43,767 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2022-01-31 19:08:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:43,768 INFO L225 Difference]: With dead ends: 395 [2022-01-31 19:08:43,768 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 19:08:43,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:08:43,769 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 696 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:43,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 38 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:08:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 19:08:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 246. [2022-01-31 19:08:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 240 states have (on average 1.2041666666666666) internal successors, (289), 240 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-01-31 19:08:43,808 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 236 [2022-01-31 19:08:43,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:43,808 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-01-31 19:08:43,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-01-31 19:08:43,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 19:08:43,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:43,809 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:43,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:08:43,809 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:43,810 INFO L85 PathProgramCache]: Analyzing trace with hash -241836271, now seen corresponding path program 45 times [2022-01-31 19:08:43,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:43,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115931396] [2022-01-31 19:08:43,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:43,811 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:43,811 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:43,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:43,816 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:44,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:44,638 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:44,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115931396] [2022-01-31 19:08:44,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115931396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:44,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:44,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 19:08:44,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066699743] [2022-01-31 19:08:44,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:44,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 19:08:44,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 19:08:44,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:08:44,640 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:45,921 INFO L93 Difference]: Finished difference Result 403 states and 502 transitions. [2022-01-31 19:08:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:08:45,921 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-01-31 19:08:45,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:45,922 INFO L225 Difference]: With dead ends: 403 [2022-01-31 19:08:45,922 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 19:08:45,923 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 19:08:45,923 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 692 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:45,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 43 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:08:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 19:08:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 251. [2022-01-31 19:08:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 245 states have (on average 1.2040816326530612) internal successors, (295), 245 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 300 transitions. [2022-01-31 19:08:45,977 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 300 transitions. Word has length 241 [2022-01-31 19:08:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:45,977 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 300 transitions. [2022-01-31 19:08:45,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 300 transitions. [2022-01-31 19:08:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 19:08:45,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:45,978 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:45,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:08:45,978 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1930347776, now seen corresponding path program 46 times [2022-01-31 19:08:45,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:45,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531770061] [2022-01-31 19:08:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:45,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:45,980 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:45,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:45,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:46,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:46,768 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531770061] [2022-01-31 19:08:46,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [531770061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:46,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:46,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:08:46,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575186647] [2022-01-31 19:08:46,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:46,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:08:46,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:46,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:08:46,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:08:46,769 INFO L87 Difference]: Start difference. First operand 251 states and 300 transitions. Second operand has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:47,629 INFO L93 Difference]: Finished difference Result 411 states and 512 transitions. [2022-01-31 19:08:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:08:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2022-01-31 19:08:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:47,630 INFO L225 Difference]: With dead ends: 411 [2022-01-31 19:08:47,630 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 19:08:47,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:08:47,631 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 667 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:47,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 48 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 19:08:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 256. [2022-01-31 19:08:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.204) internal successors, (301), 250 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 306 transitions. [2022-01-31 19:08:47,672 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 306 transitions. Word has length 246 [2022-01-31 19:08:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:47,673 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 306 transitions. [2022-01-31 19:08:47,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:47,673 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 306 transitions. [2022-01-31 19:08:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 19:08:47,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:47,674 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:47,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:08:47,674 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:47,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:47,674 INFO L85 PathProgramCache]: Analyzing trace with hash 527273901, now seen corresponding path program 47 times [2022-01-31 19:08:47,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:47,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119248274] [2022-01-31 19:08:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:47,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:47,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:47,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:47,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:48,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:48,539 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:48,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119248274] [2022-01-31 19:08:48,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1119248274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:48,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:48,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 19:08:48,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969826232] [2022-01-31 19:08:48,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:48,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 19:08:48,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:48,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 19:08:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:08:48,540 INFO L87 Difference]: Start difference. First operand 256 states and 306 transitions. Second operand has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:49,797 INFO L93 Difference]: Finished difference Result 419 states and 522 transitions. [2022-01-31 19:08:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 19:08:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 19:08:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:49,798 INFO L225 Difference]: With dead ends: 419 [2022-01-31 19:08:49,798 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 19:08:49,799 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 19:08:49,800 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 714 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:49,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 43 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:08:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 19:08:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2022-01-31 19:08:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 255 states have (on average 1.203921568627451) internal successors, (307), 255 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 312 transitions. [2022-01-31 19:08:49,843 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 312 transitions. Word has length 251 [2022-01-31 19:08:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:49,843 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 312 transitions. [2022-01-31 19:08:49,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 312 transitions. [2022-01-31 19:08:49,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-01-31 19:08:49,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:49,844 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:49,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:08:49,844 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash 374307940, now seen corresponding path program 48 times [2022-01-31 19:08:49,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:49,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011496533] [2022-01-31 19:08:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:49,846 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:49,846 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:49,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:49,851 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:50,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:50,697 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:50,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011496533] [2022-01-31 19:08:50,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2011496533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:50,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:50,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 19:08:50,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90264193] [2022-01-31 19:08:50,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:50,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 19:08:50,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 19:08:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:08:50,698 INFO L87 Difference]: Start difference. First operand 261 states and 312 transitions. Second operand has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:51,876 INFO L93 Difference]: Finished difference Result 427 states and 532 transitions. [2022-01-31 19:08:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 19:08:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2022-01-31 19:08:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:51,878 INFO L225 Difference]: With dead ends: 427 [2022-01-31 19:08:51,878 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 19:08:51,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 19:08:51,880 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 716 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:51,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 48 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:08:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 19:08:51,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 266. [2022-01-31 19:08:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 260 states have (on average 1.2038461538461538) internal successors, (313), 260 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 318 transitions. [2022-01-31 19:08:51,948 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 318 transitions. Word has length 256 [2022-01-31 19:08:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:51,948 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 318 transitions. [2022-01-31 19:08:51,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 318 transitions. [2022-01-31 19:08:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 19:08:51,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:51,949 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:51,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:08:51,950 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1863458743, now seen corresponding path program 49 times [2022-01-31 19:08:51,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:51,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746851062] [2022-01-31 19:08:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:51,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:51,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:51,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:51,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:52,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:52,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:52,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746851062] [2022-01-31 19:08:52,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [746851062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:52,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:52,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 19:08:52,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648848929] [2022-01-31 19:08:52,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:52,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 19:08:52,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 19:08:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:08:52,910 INFO L87 Difference]: Start difference. First operand 266 states and 318 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:53,834 INFO L93 Difference]: Finished difference Result 435 states and 542 transitions. [2022-01-31 19:08:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:08:53,834 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2022-01-31 19:08:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:53,835 INFO L225 Difference]: With dead ends: 435 [2022-01-31 19:08:53,835 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 19:08:53,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 19:08:53,836 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 775 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:53,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 38 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 19:08:53,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2022-01-31 19:08:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 265 states have (on average 1.2037735849056603) internal successors, (319), 265 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:53,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 324 transitions. [2022-01-31 19:08:53,883 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 324 transitions. Word has length 261 [2022-01-31 19:08:53,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:53,883 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 324 transitions. [2022-01-31 19:08:53,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:53,883 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 324 transitions. [2022-01-31 19:08:53,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-31 19:08:53,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:53,884 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:53,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:08:53,884 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:53,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:53,885 INFO L85 PathProgramCache]: Analyzing trace with hash 746894280, now seen corresponding path program 50 times [2022-01-31 19:08:53,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:53,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117123870] [2022-01-31 19:08:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:53,886 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:53,886 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:53,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:53,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:54,491 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:54,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117123870] [2022-01-31 19:08:54,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [117123870] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:54,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:54,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 19:08:54,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944767165] [2022-01-31 19:08:54,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:54,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 19:08:54,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:54,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 19:08:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:08:54,492 INFO L87 Difference]: Start difference. First operand 271 states and 324 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:55,631 INFO L93 Difference]: Finished difference Result 443 states and 552 transitions. [2022-01-31 19:08:55,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 19:08:55,631 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2022-01-31 19:08:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:55,632 INFO L225 Difference]: With dead ends: 443 [2022-01-31 19:08:55,632 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 19:08:55,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 19:08:55,633 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 885 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:55,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 38 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:08:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 19:08:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 276. [2022-01-31 19:08:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 270 states have (on average 1.2037037037037037) internal successors, (325), 270 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 330 transitions. [2022-01-31 19:08:55,681 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 330 transitions. Word has length 266 [2022-01-31 19:08:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:55,681 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 330 transitions. [2022-01-31 19:08:55,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:55,681 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 330 transitions. [2022-01-31 19:08:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 19:08:55,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:55,682 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:55,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:08:55,683 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:55,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1174180069, now seen corresponding path program 51 times [2022-01-31 19:08:55,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:55,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612804642] [2022-01-31 19:08:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:55,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:55,684 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:55,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:55,690 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:56,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:56,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:56,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612804642] [2022-01-31 19:08:56,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1612804642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:56,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:56,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 19:08:56,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819223323] [2022-01-31 19:08:56,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:56,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 19:08:56,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:56,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 19:08:56,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:08:56,517 INFO L87 Difference]: Start difference. First operand 276 states and 330 transitions. Second operand has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:57,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:57,935 INFO L93 Difference]: Finished difference Result 451 states and 562 transitions. [2022-01-31 19:08:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 19:08:57,935 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 19:08:57,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:57,936 INFO L225 Difference]: With dead ends: 451 [2022-01-31 19:08:57,936 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 19:08:57,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 19:08:57,937 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 809 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:57,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 33 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:08:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 19:08:57,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 281. [2022-01-31 19:08:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 275 states have (on average 1.2036363636363636) internal successors, (331), 275 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:08:57,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 336 transitions. [2022-01-31 19:08:57,988 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 336 transitions. Word has length 271 [2022-01-31 19:08:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:57,988 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 336 transitions. [2022-01-31 19:08:57,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:08:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 336 transitions. [2022-01-31 19:08:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-01-31 19:08:57,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:57,989 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:57,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:08:57,989 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:57,990 INFO L85 PathProgramCache]: Analyzing trace with hash -133649620, now seen corresponding path program 52 times [2022-01-31 19:08:57,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:57,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021822131] [2022-01-31 19:08:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:57,993 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:57,993 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:57,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:57,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:59,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:59,011 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:59,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021822131] [2022-01-31 19:08:59,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2021822131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:59,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:59,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 19:08:59,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357289089] [2022-01-31 19:08:59,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:59,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 19:08:59,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:59,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 19:08:59,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:08:59,013 INFO L87 Difference]: Start difference. First operand 281 states and 336 transitions. Second operand has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:00,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:00,023 INFO L93 Difference]: Finished difference Result 459 states and 572 transitions. [2022-01-31 19:09:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:09:00,023 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 276 [2022-01-31 19:09:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:00,024 INFO L225 Difference]: With dead ends: 459 [2022-01-31 19:09:00,024 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 19:09:00,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 19:09:00,029 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 805 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:00,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 48 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:09:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 19:09:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2022-01-31 19:09:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.2035714285714285) internal successors, (337), 280 states have internal predecessors, (337), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 342 transitions. [2022-01-31 19:09:00,081 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 342 transitions. Word has length 276 [2022-01-31 19:09:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:00,081 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 342 transitions. [2022-01-31 19:09:00,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 342 transitions. [2022-01-31 19:09:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 19:09:00,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:00,082 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:00,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:09:00,083 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:00,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2130747007, now seen corresponding path program 53 times [2022-01-31 19:09:00,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:00,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356323554] [2022-01-31 19:09:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:00,084 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:00,084 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:00,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:00,090 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:00,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:00,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356323554] [2022-01-31 19:09:00,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1356323554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:00,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:00,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 19:09:00,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754238447] [2022-01-31 19:09:00,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:00,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 19:09:00,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 19:09:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:09:00,752 INFO L87 Difference]: Start difference. First operand 286 states and 342 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:01,822 INFO L93 Difference]: Finished difference Result 467 states and 582 transitions. [2022-01-31 19:09:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 19:09:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-01-31 19:09:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:01,823 INFO L225 Difference]: With dead ends: 467 [2022-01-31 19:09:01,823 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 19:09:01,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 19:09:01,825 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 828 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:01,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 48 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:09:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 19:09:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2022-01-31 19:09:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 285 states have (on average 1.2035087719298245) internal successors, (343), 285 states have internal predecessors, (343), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 348 transitions. [2022-01-31 19:09:01,893 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 348 transitions. Word has length 281 [2022-01-31 19:09:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:01,893 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 348 transitions. [2022-01-31 19:09:01,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 348 transitions. [2022-01-31 19:09:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-31 19:09:01,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:01,895 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:01,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:09:01,895 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:01,895 INFO L85 PathProgramCache]: Analyzing trace with hash -357195120, now seen corresponding path program 54 times [2022-01-31 19:09:01,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:01,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310497120] [2022-01-31 19:09:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:01,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:01,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:01,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:01,903 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:03,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:03,011 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:03,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310497120] [2022-01-31 19:09:03,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310497120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:03,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:03,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 19:09:03,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523332008] [2022-01-31 19:09:03,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:03,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 19:09:03,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 19:09:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:09:03,012 INFO L87 Difference]: Start difference. First operand 291 states and 348 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:04,702 INFO L93 Difference]: Finished difference Result 475 states and 592 transitions. [2022-01-31 19:09:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 19:09:04,702 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2022-01-31 19:09:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:04,703 INFO L225 Difference]: With dead ends: 475 [2022-01-31 19:09:04,703 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 19:09:04,704 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 19:09:04,705 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 791 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:04,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 63 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:04,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 19:09:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 296. [2022-01-31 19:09:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.203448275862069) internal successors, (349), 290 states have internal predecessors, (349), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 354 transitions. [2022-01-31 19:09:04,760 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 354 transitions. Word has length 286 [2022-01-31 19:09:04,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:04,761 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 354 transitions. [2022-01-31 19:09:04,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:04,761 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 354 transitions. [2022-01-31 19:09:04,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 19:09:04,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:04,762 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:04,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:09:04,762 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:04,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:04,762 INFO L85 PathProgramCache]: Analyzing trace with hash -488893923, now seen corresponding path program 55 times [2022-01-31 19:09:04,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:04,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126378284] [2022-01-31 19:09:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:04,764 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:04,764 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:04,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:04,771 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:05,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:05,866 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:05,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126378284] [2022-01-31 19:09:05,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1126378284] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:05,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:05,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 19:09:05,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665974995] [2022-01-31 19:09:05,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:05,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 19:09:05,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 19:09:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:09:05,867 INFO L87 Difference]: Start difference. First operand 296 states and 354 transitions. Second operand has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:07,606 INFO L93 Difference]: Finished difference Result 483 states and 602 transitions. [2022-01-31 19:09:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:09:07,606 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 19:09:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:07,607 INFO L225 Difference]: With dead ends: 483 [2022-01-31 19:09:07,607 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 19:09:07,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 19:09:07,608 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 943 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:07,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 48 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 19:09:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 301. [2022-01-31 19:09:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 295 states have (on average 1.2033898305084745) internal successors, (355), 295 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 360 transitions. [2022-01-31 19:09:07,666 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 360 transitions. Word has length 291 [2022-01-31 19:09:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:07,666 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 360 transitions. [2022-01-31 19:09:07,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 360 transitions. [2022-01-31 19:09:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-01-31 19:09:07,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:07,667 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:07,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:09:07,667 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:07,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:07,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1981425164, now seen corresponding path program 56 times [2022-01-31 19:09:07,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:07,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665387633] [2022-01-31 19:09:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:07,669 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:07,669 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:07,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:07,676 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:08,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:08,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:08,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665387633] [2022-01-31 19:09:08,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [665387633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:08,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:08,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 19:09:08,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393312346] [2022-01-31 19:09:08,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:08,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 19:09:08,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:08,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 19:09:08,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:09:08,839 INFO L87 Difference]: Start difference. First operand 301 states and 360 transitions. Second operand has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 59 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:10,591 INFO L93 Difference]: Finished difference Result 491 states and 612 transitions. [2022-01-31 19:09:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 19:09:10,591 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 59 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 296 [2022-01-31 19:09:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:10,592 INFO L225 Difference]: With dead ends: 491 [2022-01-31 19:09:10,592 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 19:09:10,593 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 19:09:10,594 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 948 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:10,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 48 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 19:09:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 306. [2022-01-31 19:09:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 300 states have (on average 1.2033333333333334) internal successors, (361), 300 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 366 transitions. [2022-01-31 19:09:10,683 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 366 transitions. Word has length 296 [2022-01-31 19:09:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:10,683 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 366 transitions. [2022-01-31 19:09:10,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 59 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:10,683 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 366 transitions. [2022-01-31 19:09:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-31 19:09:10,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:10,684 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:10,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:09:10,685 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:10,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2030542151, now seen corresponding path program 57 times [2022-01-31 19:09:10,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:10,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567203971] [2022-01-31 19:09:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:10,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:10,686 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:10,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:10,693 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:11,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:11,877 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:11,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567203971] [2022-01-31 19:09:11,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567203971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:11,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:11,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 19:09:11,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745956969] [2022-01-31 19:09:11,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:11,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 19:09:11,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:11,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 19:09:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:09:11,879 INFO L87 Difference]: Start difference. First operand 306 states and 366 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:13,407 INFO L93 Difference]: Finished difference Result 499 states and 622 transitions. [2022-01-31 19:09:13,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 19:09:13,407 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 301 [2022-01-31 19:09:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:13,409 INFO L225 Difference]: With dead ends: 499 [2022-01-31 19:09:13,409 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 19:09:13,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 19:09:13,410 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 812 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:13,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 53 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 19:09:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 311. [2022-01-31 19:09:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 305 states have (on average 1.20327868852459) internal successors, (367), 305 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 372 transitions. [2022-01-31 19:09:13,471 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 372 transitions. Word has length 301 [2022-01-31 19:09:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:13,471 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 372 transitions. [2022-01-31 19:09:13,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 372 transitions. [2022-01-31 19:09:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-31 19:09:13,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:13,474 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:13,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 19:09:13,474 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1383305560, now seen corresponding path program 58 times [2022-01-31 19:09:13,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:13,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100549972] [2022-01-31 19:09:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:13,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:13,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:13,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:13,484 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:14,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:14,421 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:14,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100549972] [2022-01-31 19:09:14,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1100549972] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:14,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:14,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 19:09:14,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729051371] [2022-01-31 19:09:14,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:14,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 19:09:14,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 19:09:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:09:14,423 INFO L87 Difference]: Start difference. First operand 311 states and 372 transitions. Second operand has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:15,653 INFO L93 Difference]: Finished difference Result 507 states and 632 transitions. [2022-01-31 19:09:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:09:15,653 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 306 [2022-01-31 19:09:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:15,654 INFO L225 Difference]: With dead ends: 507 [2022-01-31 19:09:15,654 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 19:09:15,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 19:09:15,657 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 874 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:15,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 63 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:09:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 19:09:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 316. [2022-01-31 19:09:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.2032258064516128) internal successors, (373), 310 states have internal predecessors, (373), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 378 transitions. [2022-01-31 19:09:15,734 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 378 transitions. Word has length 306 [2022-01-31 19:09:15,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:15,734 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 378 transitions. [2022-01-31 19:09:15,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:15,734 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 378 transitions. [2022-01-31 19:09:15,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 19:09:15,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:15,735 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:15,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 19:09:15,735 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash 523899733, now seen corresponding path program 59 times [2022-01-31 19:09:15,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:15,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132378726] [2022-01-31 19:09:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:15,737 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:15,737 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:15,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:15,745 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:16,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:16,621 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 19:09:16,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:16,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132378726] [2022-01-31 19:09:16,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [132378726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:16,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:16,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 19:09:16,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061188111] [2022-01-31 19:09:16,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:16,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 19:09:16,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:16,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 19:09:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:09:16,623 INFO L87 Difference]: Start difference. First operand 316 states and 378 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:17,933 INFO L93 Difference]: Finished difference Result 515 states and 642 transitions. [2022-01-31 19:09:17,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 19:09:17,933 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-01-31 19:09:17,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:17,934 INFO L225 Difference]: With dead ends: 515 [2022-01-31 19:09:17,934 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 19:09:17,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 19:09:17,935 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 978 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:17,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 48 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:09:17,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 19:09:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 321. [2022-01-31 19:09:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 315 states have (on average 1.2031746031746031) internal successors, (379), 315 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 384 transitions. [2022-01-31 19:09:18,001 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 384 transitions. Word has length 311 [2022-01-31 19:09:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:18,001 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 384 transitions. [2022-01-31 19:09:18,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 384 transitions. [2022-01-31 19:09:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-01-31 19:09:18,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:18,002 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:18,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 19:09:18,002 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:18,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:18,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1665595204, now seen corresponding path program 60 times [2022-01-31 19:09:18,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:18,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202963780] [2022-01-31 19:09:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:18,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:18,005 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:18,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:18,012 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:18,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:18,917 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:18,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202963780] [2022-01-31 19:09:18,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [202963780] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:18,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:18,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 19:09:18,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579239370] [2022-01-31 19:09:18,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:18,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 19:09:18,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 19:09:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:09:18,919 INFO L87 Difference]: Start difference. First operand 321 states and 384 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:20,262 INFO L93 Difference]: Finished difference Result 523 states and 652 transitions. [2022-01-31 19:09:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 19:09:20,264 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 316 [2022-01-31 19:09:20,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:20,265 INFO L225 Difference]: With dead ends: 523 [2022-01-31 19:09:20,265 INFO L226 Difference]: Without dead ends: 329 [2022-01-31 19:09:20,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 19:09:20,266 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 971 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:20,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 33 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-31 19:09:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 326. [2022-01-31 19:09:20,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 320 states have (on average 1.203125) internal successors, (385), 320 states have internal predecessors, (385), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 390 transitions. [2022-01-31 19:09:20,333 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 390 transitions. Word has length 316 [2022-01-31 19:09:20,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:20,333 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 390 transitions. [2022-01-31 19:09:20,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 390 transitions. [2022-01-31 19:09:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-31 19:09:20,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:20,335 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:20,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 19:09:20,335 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:20,335 INFO L85 PathProgramCache]: Analyzing trace with hash 268887025, now seen corresponding path program 61 times [2022-01-31 19:09:20,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:20,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963959163] [2022-01-31 19:09:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:20,341 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:20,341 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:20,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:20,352 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:21,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:21,504 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:21,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963959163] [2022-01-31 19:09:21,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [963959163] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:21,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:21,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 19:09:21,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251872453] [2022-01-31 19:09:21,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:21,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 19:09:21,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:21,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 19:09:21,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:09:21,506 INFO L87 Difference]: Start difference. First operand 326 states and 390 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:23,334 INFO L93 Difference]: Finished difference Result 531 states and 662 transitions. [2022-01-31 19:09:23,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 19:09:23,334 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 321 [2022-01-31 19:09:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:23,335 INFO L225 Difference]: With dead ends: 531 [2022-01-31 19:09:23,335 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 19:09:23,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 19:09:23,336 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1204 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:23,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 43 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 19:09:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 331. [2022-01-31 19:09:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 325 states have (on average 1.2030769230769232) internal successors, (391), 325 states have internal predecessors, (391), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 396 transitions. [2022-01-31 19:09:23,406 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 396 transitions. Word has length 321 [2022-01-31 19:09:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:23,407 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 396 transitions. [2022-01-31 19:09:23,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 396 transitions. [2022-01-31 19:09:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-31 19:09:23,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:23,408 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:23,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 19:09:23,408 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2138013664, now seen corresponding path program 62 times [2022-01-31 19:09:23,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:23,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100753970] [2022-01-31 19:09:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:23,410 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:23,410 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:23,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:23,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:24,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:24,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:24,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100753970] [2022-01-31 19:09:24,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100753970] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:24,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:24,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 19:09:24,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018444783] [2022-01-31 19:09:24,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:24,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 19:09:24,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:24,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 19:09:24,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:09:24,753 INFO L87 Difference]: Start difference. First operand 331 states and 396 transitions. Second operand has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:26,221 INFO L93 Difference]: Finished difference Result 539 states and 672 transitions. [2022-01-31 19:09:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 19:09:26,222 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 326 [2022-01-31 19:09:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:26,223 INFO L225 Difference]: With dead ends: 539 [2022-01-31 19:09:26,223 INFO L226 Difference]: Without dead ends: 339 [2022-01-31 19:09:26,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 19:09:26,224 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 978 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:26,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 48 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-31 19:09:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 336. [2022-01-31 19:09:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 330 states have (on average 1.2030303030303031) internal successors, (397), 330 states have internal predecessors, (397), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 402 transitions. [2022-01-31 19:09:26,309 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 402 transitions. Word has length 326 [2022-01-31 19:09:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:26,309 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 402 transitions. [2022-01-31 19:09:26,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 402 transitions. [2022-01-31 19:09:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 19:09:26,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:26,310 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:26,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 19:09:26,310 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:26,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:26,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1941662579, now seen corresponding path program 63 times [2022-01-31 19:09:26,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:26,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639892397] [2022-01-31 19:09:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:26,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:26,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:26,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:26,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:27,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:27,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639892397] [2022-01-31 19:09:27,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [639892397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:27,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:27,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 19:09:27,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078552655] [2022-01-31 19:09:27,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:27,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 19:09:27,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:27,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 19:09:27,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:09:27,775 INFO L87 Difference]: Start difference. First operand 336 states and 402 transitions. Second operand has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:29,722 INFO L93 Difference]: Finished difference Result 547 states and 682 transitions. [2022-01-31 19:09:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 19:09:29,722 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 331 [2022-01-31 19:09:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:29,723 INFO L225 Difference]: With dead ends: 547 [2022-01-31 19:09:29,723 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 19:09:29,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 19:09:29,724 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 929 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:29,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 58 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 19:09:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 341. [2022-01-31 19:09:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 335 states have (on average 1.2029850746268658) internal successors, (403), 335 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 408 transitions. [2022-01-31 19:09:29,798 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 408 transitions. Word has length 331 [2022-01-31 19:09:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:29,798 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 408 transitions. [2022-01-31 19:09:29,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 408 transitions. [2022-01-31 19:09:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-01-31 19:09:29,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:29,799 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:29,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 19:09:29,799 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:29,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1185663100, now seen corresponding path program 64 times [2022-01-31 19:09:29,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:29,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799716202] [2022-01-31 19:09:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:29,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:29,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:29,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:29,809 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:31,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:31,300 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:31,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799716202] [2022-01-31 19:09:31,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1799716202] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:31,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:31,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 19:09:31,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356627671] [2022-01-31 19:09:31,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:31,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 19:09:31,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:31,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 19:09:31,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:09:31,301 INFO L87 Difference]: Start difference. First operand 341 states and 408 transitions. Second operand has 68 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:33,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:33,001 INFO L93 Difference]: Finished difference Result 555 states and 692 transitions. [2022-01-31 19:09:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 19:09:33,001 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 336 [2022-01-31 19:09:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:33,002 INFO L225 Difference]: With dead ends: 555 [2022-01-31 19:09:33,002 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 19:09:33,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 19:09:33,004 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1045 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:33,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1046 Valid, 48 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 19:09:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 346. [2022-01-31 19:09:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 340 states have (on average 1.2029411764705882) internal successors, (409), 340 states have internal predecessors, (409), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 414 transitions. [2022-01-31 19:09:33,091 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 414 transitions. Word has length 336 [2022-01-31 19:09:33,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:33,091 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 414 transitions. [2022-01-31 19:09:33,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:33,093 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 414 transitions. [2022-01-31 19:09:33,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-01-31 19:09:33,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:33,094 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:33,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 19:09:33,095 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:33,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:33,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1319574231, now seen corresponding path program 65 times [2022-01-31 19:09:33,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:33,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176305608] [2022-01-31 19:09:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:33,111 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:33,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:33,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:33,120 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:34,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:34,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:34,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176305608] [2022-01-31 19:09:34,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176305608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:34,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:34,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 19:09:34,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362776171] [2022-01-31 19:09:34,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:34,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 19:09:34,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:34,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 19:09:34,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:09:34,682 INFO L87 Difference]: Start difference. First operand 346 states and 414 transitions. Second operand has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 68 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:36,644 INFO L93 Difference]: Finished difference Result 563 states and 702 transitions. [2022-01-31 19:09:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 19:09:36,644 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 68 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 341 [2022-01-31 19:09:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:36,645 INFO L225 Difference]: With dead ends: 563 [2022-01-31 19:09:36,645 INFO L226 Difference]: Without dead ends: 354 [2022-01-31 19:09:36,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 19:09:36,647 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1050 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:36,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 58 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:09:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-31 19:09:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 351. [2022-01-31 19:09:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 345 states have (on average 1.2028985507246377) internal successors, (415), 345 states have internal predecessors, (415), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 420 transitions. [2022-01-31 19:09:36,754 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 420 transitions. Word has length 341 [2022-01-31 19:09:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:36,754 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 420 transitions. [2022-01-31 19:09:36,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 68 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 420 transitions. [2022-01-31 19:09:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-01-31 19:09:36,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:36,755 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:36,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 19:09:36,755 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:36,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:36,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1981911320, now seen corresponding path program 66 times [2022-01-31 19:09:36,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:36,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578069700] [2022-01-31 19:09:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:36,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:36,757 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:36,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:36,765 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:38,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:38,249 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:38,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578069700] [2022-01-31 19:09:38,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578069700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:38,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:38,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 19:09:38,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756528583] [2022-01-31 19:09:38,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:38,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 19:09:38,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:38,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 19:09:38,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:09:38,251 INFO L87 Difference]: Start difference. First operand 351 states and 420 transitions. Second operand has 70 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:39,955 INFO L93 Difference]: Finished difference Result 571 states and 712 transitions. [2022-01-31 19:09:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 19:09:39,955 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 346 [2022-01-31 19:09:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:39,956 INFO L225 Difference]: With dead ends: 571 [2022-01-31 19:09:39,956 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 19:09:39,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 19:09:39,958 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1031 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:39,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 58 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 19:09:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 356. [2022-01-31 19:09:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 350 states have (on average 1.2028571428571428) internal successors, (421), 350 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 426 transitions. [2022-01-31 19:09:40,061 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 426 transitions. Word has length 346 [2022-01-31 19:09:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:40,061 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 426 transitions. [2022-01-31 19:09:40,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 426 transitions. [2022-01-31 19:09:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 19:09:40,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:40,062 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:40,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 19:09:40,062 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:40,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1557555771, now seen corresponding path program 67 times [2022-01-31 19:09:40,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:40,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353349671] [2022-01-31 19:09:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:40,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:40,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:40,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:40,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:41,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:41,699 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:41,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353349671] [2022-01-31 19:09:41,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [353349671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:41,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:41,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 19:09:41,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948115626] [2022-01-31 19:09:41,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:41,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 19:09:41,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:41,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 19:09:41,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:09:41,701 INFO L87 Difference]: Start difference. First operand 356 states and 426 transitions. Second operand has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:43,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:43,485 INFO L93 Difference]: Finished difference Result 579 states and 722 transitions. [2022-01-31 19:09:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 19:09:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 351 [2022-01-31 19:09:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:43,486 INFO L225 Difference]: With dead ends: 579 [2022-01-31 19:09:43,486 INFO L226 Difference]: Without dead ends: 364 [2022-01-31 19:09:43,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 19:09:43,487 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 985 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:43,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 58 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-31 19:09:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 361. [2022-01-31 19:09:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 355 states have (on average 1.2028169014084507) internal successors, (427), 355 states have internal predecessors, (427), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 432 transitions. [2022-01-31 19:09:43,609 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 432 transitions. Word has length 351 [2022-01-31 19:09:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:43,610 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 432 transitions. [2022-01-31 19:09:43,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 432 transitions. [2022-01-31 19:09:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-01-31 19:09:43,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:43,611 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:43,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 19:09:43,611 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:43,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1601608116, now seen corresponding path program 68 times [2022-01-31 19:09:43,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:43,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824397356] [2022-01-31 19:09:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:43,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:43,614 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:43,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:43,626 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:44,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:44,898 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:44,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824397356] [2022-01-31 19:09:44,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824397356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:44,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:44,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 19:09:44,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711558548] [2022-01-31 19:09:44,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:44,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 19:09:44,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:44,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 19:09:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:09:44,900 INFO L87 Difference]: Start difference. First operand 361 states and 432 transitions. Second operand has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 71 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:47,082 INFO L93 Difference]: Finished difference Result 587 states and 732 transitions. [2022-01-31 19:09:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 19:09:47,082 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 71 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 356 [2022-01-31 19:09:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:47,083 INFO L225 Difference]: With dead ends: 587 [2022-01-31 19:09:47,083 INFO L226 Difference]: Without dead ends: 369 [2022-01-31 19:09:47,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 19:09:47,084 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1242 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:47,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 43 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:09:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-31 19:09:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2022-01-31 19:09:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 360 states have (on average 1.2027777777777777) internal successors, (433), 360 states have internal predecessors, (433), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 438 transitions. [2022-01-31 19:09:47,171 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 438 transitions. Word has length 356 [2022-01-31 19:09:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:47,171 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 438 transitions. [2022-01-31 19:09:47,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 71 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 438 transitions. [2022-01-31 19:09:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-01-31 19:09:47,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:47,172 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:47,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 19:09:47,172 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:47,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1474533791, now seen corresponding path program 69 times [2022-01-31 19:09:47,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:47,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535160546] [2022-01-31 19:09:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:47,190 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:47,190 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:47,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:47,201 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:48,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:48,901 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:48,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535160546] [2022-01-31 19:09:48,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1535160546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:48,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:48,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 19:09:48,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55953747] [2022-01-31 19:09:48,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:48,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 19:09:48,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 19:09:48,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:09:48,903 INFO L87 Difference]: Start difference. First operand 366 states and 438 transitions. Second operand has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:51,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:51,460 INFO L93 Difference]: Finished difference Result 595 states and 742 transitions. [2022-01-31 19:09:51,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 19:09:51,460 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 361 [2022-01-31 19:09:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:51,468 INFO L225 Difference]: With dead ends: 595 [2022-01-31 19:09:51,468 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 19:09:51,469 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 19:09:51,469 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1298 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:51,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1299 Valid, 43 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:09:51,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 19:09:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 371. [2022-01-31 19:09:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 365 states have (on average 1.2027397260273973) internal successors, (439), 365 states have internal predecessors, (439), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 444 transitions. [2022-01-31 19:09:51,557 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 444 transitions. Word has length 361 [2022-01-31 19:09:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:51,557 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 444 transitions. [2022-01-31 19:09:51,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 444 transitions. [2022-01-31 19:09:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-01-31 19:09:51,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:51,558 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:51,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 19:09:51,559 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:51,559 INFO L85 PathProgramCache]: Analyzing trace with hash -80781904, now seen corresponding path program 70 times [2022-01-31 19:09:51,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:51,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346844208] [2022-01-31 19:09:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:51,560 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:51,560 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:51,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:51,571 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:53,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:53,074 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:53,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346844208] [2022-01-31 19:09:53,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1346844208] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:53,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:53,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 19:09:53,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274865915] [2022-01-31 19:09:53,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:53,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 19:09:53,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:53,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 19:09:53,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:09:53,075 INFO L87 Difference]: Start difference. First operand 371 states and 444 transitions. Second operand has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:54,842 INFO L93 Difference]: Finished difference Result 603 states and 752 transitions. [2022-01-31 19:09:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 19:09:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 366 [2022-01-31 19:09:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:54,843 INFO L225 Difference]: With dead ends: 603 [2022-01-31 19:09:54,843 INFO L226 Difference]: Without dead ends: 379 [2022-01-31 19:09:54,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 19:09:54,844 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1216 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:54,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 43 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:09:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-31 19:09:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 376. [2022-01-31 19:09:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.2027027027027026) internal successors, (445), 370 states have internal predecessors, (445), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 450 transitions. [2022-01-31 19:09:54,934 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 450 transitions. Word has length 366 [2022-01-31 19:09:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:54,934 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 450 transitions. [2022-01-31 19:09:54,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 450 transitions. [2022-01-31 19:09:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 19:09:54,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:54,936 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:54,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 19:09:54,936 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1159141117, now seen corresponding path program 71 times [2022-01-31 19:09:54,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:54,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925801155] [2022-01-31 19:09:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:54,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:54,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:54,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:54,949 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:55,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:55,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:55,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925801155] [2022-01-31 19:09:55,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [925801155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:55,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:55,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 19:09:55,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988704624] [2022-01-31 19:09:55,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:55,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 19:09:55,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:55,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 19:09:55,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:09:55,990 INFO L87 Difference]: Start difference. First operand 376 states and 450 transitions. Second operand has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 74 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:57,946 INFO L93 Difference]: Finished difference Result 611 states and 762 transitions. [2022-01-31 19:09:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 19:09:57,946 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 74 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 371 [2022-01-31 19:09:57,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:57,947 INFO L225 Difference]: With dead ends: 611 [2022-01-31 19:09:57,947 INFO L226 Difference]: Without dead ends: 384 [2022-01-31 19:09:57,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 19:09:57,949 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1194 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:57,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1195 Valid, 48 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:09:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-31 19:09:58,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 381. [2022-01-31 19:09:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 375 states have (on average 1.2026666666666668) internal successors, (451), 375 states have internal predecessors, (451), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 456 transitions. [2022-01-31 19:09:58,041 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 456 transitions. Word has length 371 [2022-01-31 19:09:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:58,041 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 456 transitions. [2022-01-31 19:09:58,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 74 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 456 transitions. [2022-01-31 19:09:58,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-01-31 19:09:58,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:58,043 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:58,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 19:09:58,043 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:58,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:58,043 INFO L85 PathProgramCache]: Analyzing trace with hash -886401772, now seen corresponding path program 72 times [2022-01-31 19:09:58,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:58,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473971567] [2022-01-31 19:09:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:58,045 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:58,045 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:58,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:58,055 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:59,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:59,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:59,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473971567] [2022-01-31 19:09:59,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [473971567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:59,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:59,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 19:09:59,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051919859] [2022-01-31 19:09:59,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:59,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 19:09:59,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 19:09:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:09:59,872 INFO L87 Difference]: Start difference. First operand 381 states and 456 transitions. Second operand has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:02,337 INFO L93 Difference]: Finished difference Result 619 states and 772 transitions. [2022-01-31 19:10:02,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 19:10:02,337 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 376 [2022-01-31 19:10:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:02,338 INFO L225 Difference]: With dead ends: 619 [2022-01-31 19:10:02,338 INFO L226 Difference]: Without dead ends: 389 [2022-01-31 19:10:02,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 19:10:02,339 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1259 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:02,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 48 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:02,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-31 19:10:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 386. [2022-01-31 19:10:02,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 380 states have (on average 1.2026315789473685) internal successors, (457), 380 states have internal predecessors, (457), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 462 transitions. [2022-01-31 19:10:02,434 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 462 transitions. Word has length 376 [2022-01-31 19:10:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:02,435 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 462 transitions. [2022-01-31 19:10:02,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:02,435 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 462 transitions. [2022-01-31 19:10:02,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-01-31 19:10:02,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:02,436 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:02,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 19:10:02,436 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:02,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1501521817, now seen corresponding path program 73 times [2022-01-31 19:10:02,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:02,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560636857] [2022-01-31 19:10:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:02,438 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:02,438 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:02,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:02,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:03,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:03,595 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:03,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560636857] [2022-01-31 19:10:03,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560636857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:03,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:03,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 19:10:03,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326814923] [2022-01-31 19:10:03,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:03,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 19:10:03,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:03,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 19:10:03,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:10:03,597 INFO L87 Difference]: Start difference. First operand 386 states and 462 transitions. Second operand has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:05,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:05,619 INFO L93 Difference]: Finished difference Result 627 states and 782 transitions. [2022-01-31 19:10:05,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 19:10:05,620 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 381 [2022-01-31 19:10:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:05,621 INFO L225 Difference]: With dead ends: 627 [2022-01-31 19:10:05,621 INFO L226 Difference]: Without dead ends: 394 [2022-01-31 19:10:05,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 19:10:05,622 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1339 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:05,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 43 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:05,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-31 19:10:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 391. [2022-01-31 19:10:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 385 states have (on average 1.2025974025974027) internal successors, (463), 385 states have internal predecessors, (463), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 468 transitions. [2022-01-31 19:10:05,720 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 468 transitions. Word has length 381 [2022-01-31 19:10:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:05,721 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 468 transitions. [2022-01-31 19:10:05,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 468 transitions. [2022-01-31 19:10:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-01-31 19:10:05,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:05,722 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:05,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 19:10:05,723 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:05,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1498762360, now seen corresponding path program 74 times [2022-01-31 19:10:05,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:05,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851154922] [2022-01-31 19:10:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:05,725 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:05,725 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:05,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:05,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:06,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:06,884 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851154922] [2022-01-31 19:10:06,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1851154922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:06,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:06,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 19:10:06,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113827032] [2022-01-31 19:10:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:06,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 19:10:06,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 19:10:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:10:06,887 INFO L87 Difference]: Start difference. First operand 391 states and 468 transitions. Second operand has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 77 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:08,946 INFO L93 Difference]: Finished difference Result 635 states and 792 transitions. [2022-01-31 19:10:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 19:10:08,947 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 77 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 386 [2022-01-31 19:10:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:08,948 INFO L225 Difference]: With dead ends: 635 [2022-01-31 19:10:08,948 INFO L226 Difference]: Without dead ends: 399 [2022-01-31 19:10:08,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 19:10:08,949 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1572 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:08,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1573 Valid, 38 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:08,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-01-31 19:10:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 396. [2022-01-31 19:10:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 390 states have (on average 1.2025641025641025) internal successors, (469), 390 states have internal predecessors, (469), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 474 transitions. [2022-01-31 19:10:09,049 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 474 transitions. Word has length 386 [2022-01-31 19:10:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:09,049 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 474 transitions. [2022-01-31 19:10:09,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 77 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 474 transitions. [2022-01-31 19:10:09,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-01-31 19:10:09,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:09,050 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:09,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 19:10:09,051 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:09,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:09,051 INFO L85 PathProgramCache]: Analyzing trace with hash 993728565, now seen corresponding path program 75 times [2022-01-31 19:10:09,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:09,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318439348] [2022-01-31 19:10:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:09,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:09,052 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:09,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:09,064 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:10,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:10,739 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 19:10:10,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318439348] [2022-01-31 19:10:10,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [318439348] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:10,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:10,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 19:10:10,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655505235] [2022-01-31 19:10:10,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:10,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 19:10:10,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:10,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 19:10:10,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:10:10,741 INFO L87 Difference]: Start difference. First operand 396 states and 474 transitions. Second operand has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:12,784 INFO L93 Difference]: Finished difference Result 643 states and 802 transitions. [2022-01-31 19:10:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 19:10:12,784 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 391 [2022-01-31 19:10:12,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:12,785 INFO L225 Difference]: With dead ends: 643 [2022-01-31 19:10:12,785 INFO L226 Difference]: Without dead ends: 404 [2022-01-31 19:10:12,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 19:10:12,786 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1382 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:12,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 43 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-31 19:10:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 401. [2022-01-31 19:10:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 395 states have (on average 1.2025316455696202) internal successors, (475), 395 states have internal predecessors, (475), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 480 transitions. [2022-01-31 19:10:12,889 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 480 transitions. Word has length 391 [2022-01-31 19:10:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:12,890 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 480 transitions. [2022-01-31 19:10:12,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 480 transitions. [2022-01-31 19:10:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-01-31 19:10:12,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:12,891 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:12,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 19:10:12,891 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:12,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash -368458788, now seen corresponding path program 76 times [2022-01-31 19:10:12,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:12,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114164222] [2022-01-31 19:10:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:12,893 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:12,893 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:12,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:12,904 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:14,938 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:14,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114164222] [2022-01-31 19:10:14,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114164222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:14,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:14,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 19:10:14,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722067597] [2022-01-31 19:10:14,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:14,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 19:10:14,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:14,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 19:10:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:10:14,940 INFO L87 Difference]: Start difference. First operand 401 states and 480 transitions. Second operand has 80 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:17,160 INFO L93 Difference]: Finished difference Result 651 states and 812 transitions. [2022-01-31 19:10:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 19:10:17,161 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 396 [2022-01-31 19:10:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:17,162 INFO L225 Difference]: With dead ends: 651 [2022-01-31 19:10:17,162 INFO L226 Difference]: Without dead ends: 409 [2022-01-31 19:10:17,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 19:10:17,163 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1354 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:17,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 58 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-31 19:10:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 406. [2022-01-31 19:10:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 400 states have (on average 1.2025) internal successors, (481), 400 states have internal predecessors, (481), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 486 transitions. [2022-01-31 19:10:17,268 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 486 transitions. Word has length 396 [2022-01-31 19:10:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:17,268 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 486 transitions. [2022-01-31 19:10:17,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 486 transitions. [2022-01-31 19:10:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-01-31 19:10:17,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:17,281 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:17,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 19:10:17,282 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:17,283 INFO L85 PathProgramCache]: Analyzing trace with hash -760223535, now seen corresponding path program 77 times [2022-01-31 19:10:17,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:17,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025300118] [2022-01-31 19:10:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:17,284 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:17,284 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:17,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:17,297 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:19,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:19,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:19,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025300118] [2022-01-31 19:10:19,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1025300118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:19,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:19,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 19:10:19,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534269667] [2022-01-31 19:10:19,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:19,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 19:10:19,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:19,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 19:10:19,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:10:19,155 INFO L87 Difference]: Start difference. First operand 406 states and 486 transitions. Second operand has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 80 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:22,142 INFO L93 Difference]: Finished difference Result 659 states and 822 transitions. [2022-01-31 19:10:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 19:10:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 80 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 401 [2022-01-31 19:10:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:22,144 INFO L225 Difference]: With dead ends: 659 [2022-01-31 19:10:22,144 INFO L226 Difference]: Without dead ends: 414 [2022-01-31 19:10:22,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 19:10:22,146 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1326 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:22,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 58 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-31 19:10:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 411. [2022-01-31 19:10:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 405 states have (on average 1.202469135802469) internal successors, (487), 405 states have internal predecessors, (487), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 492 transitions. [2022-01-31 19:10:22,270 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 492 transitions. Word has length 401 [2022-01-31 19:10:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:22,270 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 492 transitions. [2022-01-31 19:10:22,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 80 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 492 transitions. [2022-01-31 19:10:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-01-31 19:10:22,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:22,272 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:22,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 19:10:22,272 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:22,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1591592128, now seen corresponding path program 78 times [2022-01-31 19:10:22,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:22,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550835559] [2022-01-31 19:10:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:22,274 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:22,274 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:22,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:22,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:24,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:24,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:24,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550835559] [2022-01-31 19:10:24,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [550835559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:24,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:24,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 19:10:24,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707335013] [2022-01-31 19:10:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:24,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 19:10:24,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 19:10:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:10:24,385 INFO L87 Difference]: Start difference. First operand 411 states and 492 transitions. Second operand has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:27,719 INFO L93 Difference]: Finished difference Result 667 states and 832 transitions. [2022-01-31 19:10:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 19:10:27,720 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 406 [2022-01-31 19:10:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:27,721 INFO L225 Difference]: With dead ends: 667 [2022-01-31 19:10:27,721 INFO L226 Difference]: Without dead ends: 419 [2022-01-31 19:10:27,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 19:10:27,723 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1424 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:27,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1425 Valid, 53 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:10:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-31 19:10:27,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 416. [2022-01-31 19:10:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 410 states have (on average 1.2024390243902439) internal successors, (493), 410 states have internal predecessors, (493), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 498 transitions. [2022-01-31 19:10:27,835 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 498 transitions. Word has length 406 [2022-01-31 19:10:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:27,835 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 498 transitions. [2022-01-31 19:10:27,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 498 transitions. [2022-01-31 19:10:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 19:10:27,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:27,836 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:27,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 19:10:27,836 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:27,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1228695187, now seen corresponding path program 79 times [2022-01-31 19:10:27,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:27,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10257461] [2022-01-31 19:10:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:27,838 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:27,838 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:27,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:27,852 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:29,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:29,962 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:29,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10257461] [2022-01-31 19:10:29,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [10257461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:29,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:29,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 19:10:29,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929083877] [2022-01-31 19:10:29,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:29,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 19:10:29,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 19:10:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:10:29,964 INFO L87 Difference]: Start difference. First operand 416 states and 498 transitions. Second operand has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:32,677 INFO L93 Difference]: Finished difference Result 675 states and 842 transitions. [2022-01-31 19:10:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 19:10:32,678 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 19:10:32,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:32,679 INFO L225 Difference]: With dead ends: 675 [2022-01-31 19:10:32,679 INFO L226 Difference]: Without dead ends: 424 [2022-01-31 19:10:32,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 19:10:32,680 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1312 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:32,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1313 Valid, 43 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-31 19:10:32,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 421. [2022-01-31 19:10:32,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 415 states have (on average 1.202409638554217) internal successors, (499), 415 states have internal predecessors, (499), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 504 transitions. [2022-01-31 19:10:32,808 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 504 transitions. Word has length 411 [2022-01-31 19:10:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:32,808 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 504 transitions. [2022-01-31 19:10:32,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:32,808 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 504 transitions. [2022-01-31 19:10:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2022-01-31 19:10:32,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:32,809 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:32,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 19:10:32,810 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:32,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1710813860, now seen corresponding path program 80 times [2022-01-31 19:10:32,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:32,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212523274] [2022-01-31 19:10:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:32,811 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:32,811 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:32,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:32,826 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:34,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:34,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:34,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212523274] [2022-01-31 19:10:34,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [212523274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:34,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:34,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 19:10:34,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747031069] [2022-01-31 19:10:34,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:34,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 19:10:34,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:34,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 19:10:34,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:10:34,172 INFO L87 Difference]: Start difference. First operand 421 states and 504 transitions. Second operand has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:36,574 INFO L93 Difference]: Finished difference Result 683 states and 852 transitions. [2022-01-31 19:10:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 19:10:36,574 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 416 [2022-01-31 19:10:36,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:36,575 INFO L225 Difference]: With dead ends: 683 [2022-01-31 19:10:36,575 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 19:10:36,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 19:10:36,576 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1524 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:36,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1525 Valid, 38 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 19:10:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 426. [2022-01-31 19:10:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 420 states have (on average 1.2023809523809523) internal successors, (505), 420 states have internal predecessors, (505), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 510 transitions. [2022-01-31 19:10:36,693 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 510 transitions. Word has length 416 [2022-01-31 19:10:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:36,693 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 510 transitions. [2022-01-31 19:10:36,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 510 transitions. [2022-01-31 19:10:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-01-31 19:10:36,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:36,695 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:36,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 19:10:36,695 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:36,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:36,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1222371849, now seen corresponding path program 81 times [2022-01-31 19:10:36,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:36,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136027482] [2022-01-31 19:10:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:36,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:36,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:36,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:36,710 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:38,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:38,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136027482] [2022-01-31 19:10:38,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136027482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:38,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:38,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 19:10:38,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8884317] [2022-01-31 19:10:38,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:38,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 19:10:38,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:38,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 19:10:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:10:38,544 INFO L87 Difference]: Start difference. First operand 426 states and 510 transitions. Second operand has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:41,583 INFO L93 Difference]: Finished difference Result 691 states and 862 transitions. [2022-01-31 19:10:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 19:10:41,583 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 421 [2022-01-31 19:10:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:41,595 INFO L225 Difference]: With dead ends: 691 [2022-01-31 19:10:41,595 INFO L226 Difference]: Without dead ends: 434 [2022-01-31 19:10:41,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 19:10:41,597 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1373 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:41,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1374 Valid, 43 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-31 19:10:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 431. [2022-01-31 19:10:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 425 states have (on average 1.2023529411764706) internal successors, (511), 425 states have internal predecessors, (511), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 516 transitions. [2022-01-31 19:10:41,717 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 516 transitions. Word has length 421 [2022-01-31 19:10:41,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:41,717 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 516 transitions. [2022-01-31 19:10:41,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 516 transitions. [2022-01-31 19:10:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-01-31 19:10:41,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:41,719 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:41,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 19:10:41,719 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:41,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:41,719 INFO L85 PathProgramCache]: Analyzing trace with hash -949474808, now seen corresponding path program 82 times [2022-01-31 19:10:41,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:41,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667532777] [2022-01-31 19:10:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:41,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:41,721 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:41,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:41,734 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:43,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:43,847 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:43,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667532777] [2022-01-31 19:10:43,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [667532777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:43,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:43,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 19:10:43,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989534440] [2022-01-31 19:10:43,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:43,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 19:10:43,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:43,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 19:10:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:10:43,850 INFO L87 Difference]: Start difference. First operand 431 states and 516 transitions. Second operand has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:47,258 INFO L93 Difference]: Finished difference Result 699 states and 872 transitions. [2022-01-31 19:10:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 19:10:47,258 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 426 [2022-01-31 19:10:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:47,259 INFO L225 Difference]: With dead ends: 699 [2022-01-31 19:10:47,259 INFO L226 Difference]: Without dead ends: 439 [2022-01-31 19:10:47,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 19:10:47,260 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1372 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:47,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 48 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-31 19:10:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 436. [2022-01-31 19:10:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 430 states have (on average 1.2023255813953488) internal successors, (517), 430 states have internal predecessors, (517), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 522 transitions. [2022-01-31 19:10:47,412 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 522 transitions. Word has length 426 [2022-01-31 19:10:47,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:47,413 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 522 transitions. [2022-01-31 19:10:47,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 522 transitions. [2022-01-31 19:10:47,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-01-31 19:10:47,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:47,414 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:47,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 19:10:47,414 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:47,415 INFO L85 PathProgramCache]: Analyzing trace with hash -790717787, now seen corresponding path program 83 times [2022-01-31 19:10:47,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:47,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299778537] [2022-01-31 19:10:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:47,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:47,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:47,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:47,432 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:48,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:48,868 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299778537] [2022-01-31 19:10:48,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [299778537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:48,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:48,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 19:10:48,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288603772] [2022-01-31 19:10:48,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:48,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 19:10:48,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:48,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 19:10:48,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:10:48,870 INFO L87 Difference]: Start difference. First operand 436 states and 522 transitions. Second operand has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 86 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:51,498 INFO L93 Difference]: Finished difference Result 707 states and 882 transitions. [2022-01-31 19:10:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 19:10:51,499 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 86 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 431 [2022-01-31 19:10:51,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:51,500 INFO L225 Difference]: With dead ends: 707 [2022-01-31 19:10:51,500 INFO L226 Difference]: Without dead ends: 444 [2022-01-31 19:10:51,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 19:10:51,501 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1278 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:51,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1279 Valid, 63 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:51,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-31 19:10:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 441. [2022-01-31 19:10:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 435 states have (on average 1.2022988505747128) internal successors, (523), 435 states have internal predecessors, (523), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:51,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 528 transitions. [2022-01-31 19:10:51,627 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 528 transitions. Word has length 431 [2022-01-31 19:10:51,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:51,627 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 528 transitions. [2022-01-31 19:10:51,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 86 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 528 transitions. [2022-01-31 19:10:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-01-31 19:10:51,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:51,629 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:51,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 19:10:51,629 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash -540401300, now seen corresponding path program 84 times [2022-01-31 19:10:51,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:51,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609071581] [2022-01-31 19:10:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:51,631 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:51,631 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:51,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:51,645 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:53,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:53,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:53,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609071581] [2022-01-31 19:10:53,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [609071581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:53,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:53,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 19:10:53,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674816216] [2022-01-31 19:10:53,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:53,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 19:10:53,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:53,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 19:10:53,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 19:10:53,413 INFO L87 Difference]: Start difference. First operand 441 states and 528 transitions. Second operand has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:56,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:56,181 INFO L93 Difference]: Finished difference Result 715 states and 892 transitions. [2022-01-31 19:10:56,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 19:10:56,181 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 436 [2022-01-31 19:10:56,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:56,182 INFO L225 Difference]: With dead ends: 715 [2022-01-31 19:10:56,182 INFO L226 Difference]: Without dead ends: 449 [2022-01-31 19:10:56,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 19:10:56,183 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1517 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:56,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1518 Valid, 48 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-31 19:10:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 446. [2022-01-31 19:10:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 440 states have (on average 1.2022727272727274) internal successors, (529), 440 states have internal predecessors, (529), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 534 transitions. [2022-01-31 19:10:56,312 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 534 transitions. Word has length 436 [2022-01-31 19:10:56,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:56,312 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 534 transitions. [2022-01-31 19:10:56,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:56,312 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 534 transitions. [2022-01-31 19:10:56,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-01-31 19:10:56,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:56,313 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:56,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 19:10:56,313 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:56,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1724814527, now seen corresponding path program 85 times [2022-01-31 19:10:56,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:56,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443016252] [2022-01-31 19:10:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:56,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:56,315 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:56,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:56,329 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:58,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:58,803 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:58,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443016252] [2022-01-31 19:10:58,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1443016252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:58,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:58,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 19:10:58,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078894324] [2022-01-31 19:10:58,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:58,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 19:10:58,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:58,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 19:10:58,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 19:10:58,806 INFO L87 Difference]: Start difference. First operand 446 states and 534 transitions. Second operand has 89 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:02,787 INFO L93 Difference]: Finished difference Result 723 states and 902 transitions. [2022-01-31 19:11:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 19:11:02,788 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 441 [2022-01-31 19:11:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:02,789 INFO L225 Difference]: With dead ends: 723 [2022-01-31 19:11:02,789 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 19:11:02,790 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 19:11:02,790 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1387 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:02,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1388 Valid, 53 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:02,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 19:11:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2022-01-31 19:11:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 445 states have (on average 1.202247191011236) internal successors, (535), 445 states have internal predecessors, (535), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 540 transitions. [2022-01-31 19:11:02,922 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 540 transitions. Word has length 441 [2022-01-31 19:11:02,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:02,923 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 540 transitions. [2022-01-31 19:11:02,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:02,923 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 540 transitions. [2022-01-31 19:11:02,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-01-31 19:11:02,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:02,924 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:02,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 19:11:02,924 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:02,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:02,925 INFO L85 PathProgramCache]: Analyzing trace with hash 955848912, now seen corresponding path program 86 times [2022-01-31 19:11:02,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:02,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076530153] [2022-01-31 19:11:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:02,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:02,926 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:02,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:02,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:05,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:05,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:05,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076530153] [2022-01-31 19:11:05,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076530153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:05,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:05,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 19:11:05,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970958790] [2022-01-31 19:11:05,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:05,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 19:11:05,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:05,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 19:11:05,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 19:11:05,454 INFO L87 Difference]: Start difference. First operand 451 states and 540 transitions. Second operand has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 89 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:09,304 INFO L93 Difference]: Finished difference Result 731 states and 912 transitions. [2022-01-31 19:11:09,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 19:11:09,305 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 89 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 446 [2022-01-31 19:11:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:09,306 INFO L225 Difference]: With dead ends: 731 [2022-01-31 19:11:09,306 INFO L226 Difference]: Without dead ends: 459 [2022-01-31 19:11:09,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 19:11:09,307 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1509 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:09,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 48 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:11:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-31 19:11:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 456. [2022-01-31 19:11:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 450 states have (on average 1.2022222222222223) internal successors, (541), 450 states have internal predecessors, (541), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 546 transitions. [2022-01-31 19:11:09,442 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 546 transitions. Word has length 446 [2022-01-31 19:11:09,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:09,443 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 546 transitions. [2022-01-31 19:11:09,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 89 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 546 transitions. [2022-01-31 19:11:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-01-31 19:11:09,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:09,444 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:09,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 19:11:09,444 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash 179968989, now seen corresponding path program 87 times [2022-01-31 19:11:09,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:09,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99939356] [2022-01-31 19:11:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:09,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:09,446 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:09,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:09,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:12,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:12,116 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:12,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99939356] [2022-01-31 19:11:12,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [99939356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:12,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:12,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 19:11:12,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077875048] [2022-01-31 19:11:12,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:12,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 19:11:12,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:12,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 19:11:12,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:11:12,118 INFO L87 Difference]: Start difference. First operand 456 states and 546 transitions. Second operand has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:15,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:15,891 INFO L93 Difference]: Finished difference Result 739 states and 922 transitions. [2022-01-31 19:11:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 19:11:15,891 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 451 [2022-01-31 19:11:15,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:15,893 INFO L225 Difference]: With dead ends: 739 [2022-01-31 19:11:15,893 INFO L226 Difference]: Without dead ends: 464 [2022-01-31 19:11:15,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 19:11:15,894 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1703 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:15,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 38 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:11:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-01-31 19:11:16,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 461. [2022-01-31 19:11:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 455 states have (on average 1.2021978021978021) internal successors, (547), 455 states have internal predecessors, (547), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 552 transitions. [2022-01-31 19:11:16,032 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 552 transitions. Word has length 451 [2022-01-31 19:11:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:16,032 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 552 transitions. [2022-01-31 19:11:16,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 552 transitions. [2022-01-31 19:11:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-01-31 19:11:16,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:16,034 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:16,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 19:11:16,034 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:16,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1336979404, now seen corresponding path program 88 times [2022-01-31 19:11:16,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:16,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175133248] [2022-01-31 19:11:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:16,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:16,036 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:16,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:16,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:18,755 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:18,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175133248] [2022-01-31 19:11:18,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1175133248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:18,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:18,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 19:11:18,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492549595] [2022-01-31 19:11:18,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:18,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 19:11:18,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:18,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 19:11:18,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 19:11:18,757 INFO L87 Difference]: Start difference. First operand 461 states and 552 transitions. Second operand has 92 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:21,896 INFO L93 Difference]: Finished difference Result 747 states and 932 transitions. [2022-01-31 19:11:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 19:11:21,896 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 456 [2022-01-31 19:11:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:21,898 INFO L225 Difference]: With dead ends: 747 [2022-01-31 19:11:21,898 INFO L226 Difference]: Without dead ends: 469 [2022-01-31 19:11:21,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 19:11:21,899 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1435 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:21,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1436 Valid, 48 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:11:21,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-31 19:11:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 466. [2022-01-31 19:11:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 460 states have (on average 1.2021739130434783) internal successors, (553), 460 states have internal predecessors, (553), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:22,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 558 transitions. [2022-01-31 19:11:22,041 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 558 transitions. Word has length 456 [2022-01-31 19:11:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:22,041 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 558 transitions. [2022-01-31 19:11:22,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 558 transitions. [2022-01-31 19:11:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2022-01-31 19:11:22,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:22,043 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:22,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 19:11:22,043 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash -924947335, now seen corresponding path program 89 times [2022-01-31 19:11:22,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:22,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685087966] [2022-01-31 19:11:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:22,045 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:22,045 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:22,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:22,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:24,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:24,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:24,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685087966] [2022-01-31 19:11:24,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [685087966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:24,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:24,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 19:11:24,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948519914] [2022-01-31 19:11:24,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:24,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 19:11:24,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:24,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 19:11:24,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:11:24,274 INFO L87 Difference]: Start difference. First operand 466 states and 558 transitions. Second operand has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 92 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:27,486 INFO L93 Difference]: Finished difference Result 755 states and 942 transitions. [2022-01-31 19:11:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 19:11:27,486 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 92 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 461 [2022-01-31 19:11:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:27,488 INFO L225 Difference]: With dead ends: 755 [2022-01-31 19:11:27,488 INFO L226 Difference]: Without dead ends: 474 [2022-01-31 19:11:27,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 19:11:27,489 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1596 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:27,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1597 Valid, 43 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:11:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-31 19:11:27,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 471. [2022-01-31 19:11:27,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 465 states have (on average 1.2021505376344086) internal successors, (559), 465 states have internal predecessors, (559), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 564 transitions. [2022-01-31 19:11:27,635 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 564 transitions. Word has length 461 [2022-01-31 19:11:27,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:27,635 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 564 transitions. [2022-01-31 19:11:27,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 92 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:27,635 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 564 transitions. [2022-01-31 19:11:27,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2022-01-31 19:11:27,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:27,637 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:27,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 19:11:27,637 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:27,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1520895896, now seen corresponding path program 90 times [2022-01-31 19:11:27,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:27,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870719523] [2022-01-31 19:11:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:27,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:27,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:27,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:27,665 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:30,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:30,097 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:30,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870719523] [2022-01-31 19:11:30,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1870719523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:30,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:30,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 19:11:30,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940393194] [2022-01-31 19:11:30,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:30,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 19:11:30,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:30,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 19:11:30,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:11:30,100 INFO L87 Difference]: Start difference. First operand 471 states and 564 transitions. Second operand has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:34,278 INFO L93 Difference]: Finished difference Result 763 states and 952 transitions. [2022-01-31 19:11:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 19:11:34,278 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 466 [2022-01-31 19:11:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:34,279 INFO L225 Difference]: With dead ends: 763 [2022-01-31 19:11:34,279 INFO L226 Difference]: Without dead ends: 479 [2022-01-31 19:11:34,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 19:11:34,281 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1580 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1581 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:34,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1581 Valid, 43 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:11:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-31 19:11:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 476. [2022-01-31 19:11:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 470 states have (on average 1.202127659574468) internal successors, (565), 470 states have internal predecessors, (565), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 570 transitions. [2022-01-31 19:11:34,443 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 570 transitions. Word has length 466 [2022-01-31 19:11:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:34,443 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 570 transitions. [2022-01-31 19:11:34,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 570 transitions. [2022-01-31 19:11:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-01-31 19:11:34,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:34,445 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:34,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 19:11:34,445 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:34,445 INFO L85 PathProgramCache]: Analyzing trace with hash -846979819, now seen corresponding path program 91 times [2022-01-31 19:11:34,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:34,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770018388] [2022-01-31 19:11:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:34,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:34,447 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:34,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:34,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:37,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:37,292 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770018388] [2022-01-31 19:11:37,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770018388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:37,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:37,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 19:11:37,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753050144] [2022-01-31 19:11:37,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:37,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 19:11:37,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 19:11:37,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 19:11:37,295 INFO L87 Difference]: Start difference. First operand 476 states and 570 transitions. Second operand has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:40,482 INFO L93 Difference]: Finished difference Result 771 states and 962 transitions. [2022-01-31 19:11:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 19:11:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 471 [2022-01-31 19:11:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:40,483 INFO L225 Difference]: With dead ends: 771 [2022-01-31 19:11:40,483 INFO L226 Difference]: Without dead ends: 484 [2022-01-31 19:11:40,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 19:11:40,485 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1774 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:40,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1775 Valid, 38 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:11:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-31 19:11:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 481. [2022-01-31 19:11:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 475 states have (on average 1.2021052631578948) internal successors, (571), 475 states have internal predecessors, (571), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 576 transitions. [2022-01-31 19:11:40,635 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 576 transitions. Word has length 471 [2022-01-31 19:11:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:40,635 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 576 transitions. [2022-01-31 19:11:40,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 576 transitions. [2022-01-31 19:11:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-01-31 19:11:40,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:40,637 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:40,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 19:11:40,637 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:40,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1750761212, now seen corresponding path program 92 times [2022-01-31 19:11:40,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:40,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437859726] [2022-01-31 19:11:40,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:40,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:40,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:40,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:40,655 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:43,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:43,491 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:43,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437859726] [2022-01-31 19:11:43,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1437859726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:43,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:43,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 19:11:43,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187414190] [2022-01-31 19:11:43,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:43,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 19:11:43,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:43,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 19:11:43,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 19:11:43,494 INFO L87 Difference]: Start difference. First operand 481 states and 576 transitions. Second operand has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 95 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:46,680 INFO L93 Difference]: Finished difference Result 779 states and 972 transitions. [2022-01-31 19:11:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 19:11:46,681 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 95 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 476 [2022-01-31 19:11:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:46,682 INFO L225 Difference]: With dead ends: 779 [2022-01-31 19:11:46,682 INFO L226 Difference]: Without dead ends: 489 [2022-01-31 19:11:46,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 19:11:46,684 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1569 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:46,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 53 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:11:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-31 19:11:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 486. [2022-01-31 19:11:46,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 480 states have (on average 1.2020833333333334) internal successors, (577), 480 states have internal predecessors, (577), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 582 transitions. [2022-01-31 19:11:46,856 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 582 transitions. Word has length 476 [2022-01-31 19:11:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:46,856 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 582 transitions. [2022-01-31 19:11:46,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 95 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 582 transitions. [2022-01-31 19:11:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2022-01-31 19:11:46,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:46,858 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:46,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 19:11:46,858 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:46,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2062488143, now seen corresponding path program 93 times [2022-01-31 19:11:46,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:46,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888028098] [2022-01-31 19:11:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:46,860 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:46,860 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:46,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:46,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:48,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:48,868 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888028098] [2022-01-31 19:11:48,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [888028098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:48,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:48,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 19:11:48,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600672222] [2022-01-31 19:11:48,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:48,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 19:11:48,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:48,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 19:11:48,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:11:48,871 INFO L87 Difference]: Start difference. First operand 486 states and 582 transitions. Second operand has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:53,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:53,380 INFO L93 Difference]: Finished difference Result 787 states and 982 transitions. [2022-01-31 19:11:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 19:11:53,380 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 481 [2022-01-31 19:11:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:53,381 INFO L225 Difference]: With dead ends: 787 [2022-01-31 19:11:53,381 INFO L226 Difference]: Without dead ends: 494 [2022-01-31 19:11:53,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 19:11:53,383 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1841 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1842 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:53,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1842 Valid, 43 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-31 19:11:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 491. [2022-01-31 19:11:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 485 states have (on average 1.202061855670103) internal successors, (583), 485 states have internal predecessors, (583), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 588 transitions. [2022-01-31 19:11:53,542 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 588 transitions. Word has length 481 [2022-01-31 19:11:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:53,542 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 588 transitions. [2022-01-31 19:11:53,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 588 transitions. [2022-01-31 19:11:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-01-31 19:11:53,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:53,544 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:53,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 19:11:53,544 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash 155448928, now seen corresponding path program 94 times [2022-01-31 19:11:53,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:53,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064498589] [2022-01-31 19:11:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:53,546 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:53,546 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:53,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:53,580 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:56,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:56,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064498589] [2022-01-31 19:11:56,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064498589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:56,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:56,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 19:11:56,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303059130] [2022-01-31 19:11:56,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:56,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 19:11:56,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:56,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 19:11:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 19:11:56,631 INFO L87 Difference]: Start difference. First operand 491 states and 588 transitions. Second operand has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:01,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:01,050 INFO L93 Difference]: Finished difference Result 795 states and 992 transitions. [2022-01-31 19:12:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 19:12:01,051 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 486 [2022-01-31 19:12:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:01,052 INFO L225 Difference]: With dead ends: 795 [2022-01-31 19:12:01,052 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 19:12:01,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 19:12:01,054 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1543 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:01,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 48 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:12:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 19:12:01,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 496. [2022-01-31 19:12:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 490 states have (on average 1.2020408163265306) internal successors, (589), 490 states have internal predecessors, (589), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 594 transitions. [2022-01-31 19:12:01,216 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 594 transitions. Word has length 486 [2022-01-31 19:12:01,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:01,216 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 594 transitions. [2022-01-31 19:12:01,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:01,216 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 594 transitions. [2022-01-31 19:12:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-01-31 19:12:01,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:01,218 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:01,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 19:12:01,218 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:01,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:01,218 INFO L85 PathProgramCache]: Analyzing trace with hash -362111411, now seen corresponding path program 95 times [2022-01-31 19:12:01,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:01,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968322584] [2022-01-31 19:12:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:01,220 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:01,220 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:01,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:01,238 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:04,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:04,050 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:04,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968322584] [2022-01-31 19:12:04,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [968322584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:04,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:04,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 19:12:04,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22519545] [2022-01-31 19:12:04,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:04,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 19:12:04,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:04,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 19:12:04,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 19:12:04,053 INFO L87 Difference]: Start difference. First operand 496 states and 594 transitions. Second operand has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 98 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:08,341 INFO L93 Difference]: Finished difference Result 803 states and 1002 transitions. [2022-01-31 19:12:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 19:12:08,342 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 98 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 491 [2022-01-31 19:12:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:08,343 INFO L225 Difference]: With dead ends: 803 [2022-01-31 19:12:08,343 INFO L226 Difference]: Without dead ends: 504 [2022-01-31 19:12:08,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 19:12:08,345 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1668 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:08,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 43 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:12:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-31 19:12:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 501. [2022-01-31 19:12:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 495 states have (on average 1.202020202020202) internal successors, (595), 495 states have internal predecessors, (595), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:08,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 600 transitions. [2022-01-31 19:12:08,524 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 600 transitions. Word has length 491 [2022-01-31 19:12:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:08,524 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 600 transitions. [2022-01-31 19:12:08,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 98 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 600 transitions. [2022-01-31 19:12:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2022-01-31 19:12:08,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:08,526 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:08,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 19:12:08,526 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:08,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:08,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1354608068, now seen corresponding path program 96 times [2022-01-31 19:12:08,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:08,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56530032] [2022-01-31 19:12:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:08,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:08,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:08,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:08,547 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:10,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:10,419 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:10,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56530032] [2022-01-31 19:12:10,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [56530032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:10,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:10,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 19:12:10,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274578170] [2022-01-31 19:12:10,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:10,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 19:12:10,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:10,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 19:12:10,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 19:12:10,421 INFO L87 Difference]: Start difference. First operand 501 states and 600 transitions. Second operand has 100 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:14,154 INFO L93 Difference]: Finished difference Result 811 states and 1012 transitions. [2022-01-31 19:12:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 19:12:14,154 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 496 [2022-01-31 19:12:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:14,155 INFO L225 Difference]: With dead ends: 811 [2022-01-31 19:12:14,155 INFO L226 Difference]: Without dead ends: 509 [2022-01-31 19:12:14,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 19:12:14,157 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1856 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1857 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:14,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1857 Valid, 38 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:12:14,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-31 19:12:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 506. [2022-01-31 19:12:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 500 states have (on average 1.202) internal successors, (601), 500 states have internal predecessors, (601), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 606 transitions. [2022-01-31 19:12:14,341 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 606 transitions. Word has length 496 [2022-01-31 19:12:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:14,341 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 606 transitions. [2022-01-31 19:12:14,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 606 transitions. [2022-01-31 19:12:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-01-31 19:12:14,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:14,343 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:14,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 19:12:14,343 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1560875287, now seen corresponding path program 97 times [2022-01-31 19:12:14,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:14,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826399009] [2022-01-31 19:12:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:14,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:14,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:14,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:14,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:16,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:16,597 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:16,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826399009] [2022-01-31 19:12:16,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1826399009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:16,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:16,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 19:12:16,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863770487] [2022-01-31 19:12:16,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:16,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 19:12:16,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 19:12:16,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 19:12:16,599 INFO L87 Difference]: Start difference. First operand 506 states and 606 transitions. Second operand has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:20,159 INFO L93 Difference]: Finished difference Result 819 states and 1022 transitions. [2022-01-31 19:12:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 19:12:20,160 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 501 [2022-01-31 19:12:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:20,161 INFO L225 Difference]: With dead ends: 819 [2022-01-31 19:12:20,161 INFO L226 Difference]: Without dead ends: 514 [2022-01-31 19:12:20,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 19:12:20,163 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2182 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2183 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:20,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2183 Valid, 43 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:12:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-31 19:12:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 511. [2022-01-31 19:12:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 505 states have (on average 1.201980198019802) internal successors, (607), 505 states have internal predecessors, (607), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 612 transitions. [2022-01-31 19:12:20,350 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 612 transitions. Word has length 501 [2022-01-31 19:12:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:20,350 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 612 transitions. [2022-01-31 19:12:20,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 612 transitions. [2022-01-31 19:12:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2022-01-31 19:12:20,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:20,352 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:20,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 19:12:20,352 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash 430040360, now seen corresponding path program 98 times [2022-01-31 19:12:20,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:20,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220665015] [2022-01-31 19:12:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:20,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:20,354 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:20,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:20,375 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:22,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:22,339 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:22,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220665015] [2022-01-31 19:12:22,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [220665015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:22,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:22,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 19:12:22,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227200472] [2022-01-31 19:12:22,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:22,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 19:12:22,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:22,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 19:12:22,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 19:12:22,341 INFO L87 Difference]: Start difference. First operand 511 states and 612 transitions. Second operand has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 101 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:25,997 INFO L93 Difference]: Finished difference Result 827 states and 1032 transitions. [2022-01-31 19:12:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 19:12:25,997 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 101 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 506 [2022-01-31 19:12:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:26,001 INFO L225 Difference]: With dead ends: 827 [2022-01-31 19:12:26,001 INFO L226 Difference]: Without dead ends: 519 [2022-01-31 19:12:26,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 19:12:26,003 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1890 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1891 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:26,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1891 Valid, 38 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:12:26,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-31 19:12:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 516. [2022-01-31 19:12:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 510 states have (on average 1.2019607843137254) internal successors, (613), 510 states have internal predecessors, (613), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 618 transitions. [2022-01-31 19:12:26,193 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 618 transitions. Word has length 506 [2022-01-31 19:12:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:26,193 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 618 transitions. [2022-01-31 19:12:26,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 101 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 618 transitions. [2022-01-31 19:12:26,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-01-31 19:12:26,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:26,195 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:26,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 19:12:26,195 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:26,195 INFO L85 PathProgramCache]: Analyzing trace with hash 446406533, now seen corresponding path program 99 times [2022-01-31 19:12:26,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:26,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904588691] [2022-01-31 19:12:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:26,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:26,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:26,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:26,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:29,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:29,219 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:29,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904588691] [2022-01-31 19:12:29,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904588691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:29,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:29,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 19:12:29,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161079543] [2022-01-31 19:12:29,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:29,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 19:12:29,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:29,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 19:12:29,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 19:12:29,222 INFO L87 Difference]: Start difference. First operand 516 states and 618 transitions. Second operand has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:34,406 INFO L93 Difference]: Finished difference Result 835 states and 1042 transitions. [2022-01-31 19:12:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 19:12:34,406 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 511 [2022-01-31 19:12:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:34,408 INFO L225 Difference]: With dead ends: 835 [2022-01-31 19:12:34,408 INFO L226 Difference]: Without dead ends: 524 [2022-01-31 19:12:34,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 19:12:34,409 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1646 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:34,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1647 Valid, 43 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:12:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-01-31 19:12:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 521. [2022-01-31 19:12:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 515 states have (on average 1.2019417475728156) internal successors, (619), 515 states have internal predecessors, (619), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 624 transitions. [2022-01-31 19:12:34,589 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 624 transitions. Word has length 511 [2022-01-31 19:12:34,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:34,589 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 624 transitions. [2022-01-31 19:12:34,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 624 transitions. [2022-01-31 19:12:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-01-31 19:12:34,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:34,591 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:34,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 19:12:34,591 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash -364192628, now seen corresponding path program 100 times [2022-01-31 19:12:34,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:34,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126362674] [2022-01-31 19:12:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:34,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:34,593 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:34,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:34,613 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:37,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:37,260 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:37,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126362674] [2022-01-31 19:12:37,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1126362674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:37,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:37,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 19:12:37,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501185674] [2022-01-31 19:12:37,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:37,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 19:12:37,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:37,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 19:12:37,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 19:12:37,267 INFO L87 Difference]: Start difference. First operand 521 states and 624 transitions. Second operand has 104 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 103 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:41,136 INFO L93 Difference]: Finished difference Result 843 states and 1052 transitions. [2022-01-31 19:12:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 19:12:41,136 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 103 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 516 [2022-01-31 19:12:41,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:41,137 INFO L225 Difference]: With dead ends: 843 [2022-01-31 19:12:41,137 INFO L226 Difference]: Without dead ends: 529 [2022-01-31 19:12:41,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 19:12:41,140 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1867 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 658 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1868 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 658 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:41,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1868 Valid, 58 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [658 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:12:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-31 19:12:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 526. [2022-01-31 19:12:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 520 states have (on average 1.2019230769230769) internal successors, (625), 520 states have internal predecessors, (625), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 630 transitions. [2022-01-31 19:12:41,339 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 630 transitions. Word has length 516 [2022-01-31 19:12:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:41,339 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 630 transitions. [2022-01-31 19:12:41,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 103 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 630 transitions. [2022-01-31 19:12:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-01-31 19:12:41,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:41,340 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:41,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 19:12:41,341 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1614909407, now seen corresponding path program 101 times [2022-01-31 19:12:41,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:41,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287942423] [2022-01-31 19:12:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:41,344 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:41,344 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:41,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:41,366 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:43,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:43,641 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:43,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287942423] [2022-01-31 19:12:43,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [287942423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:43,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:43,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 19:12:43,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644912787] [2022-01-31 19:12:43,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:43,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 19:12:43,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 19:12:43,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 19:12:43,643 INFO L87 Difference]: Start difference. First operand 526 states and 630 transitions. Second operand has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 104 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:47,719 INFO L93 Difference]: Finished difference Result 851 states and 1062 transitions. [2022-01-31 19:12:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 19:12:47,720 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 104 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 521 [2022-01-31 19:12:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:47,720 INFO L225 Difference]: With dead ends: 851 [2022-01-31 19:12:47,720 INFO L226 Difference]: Without dead ends: 534 [2022-01-31 19:12:47,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 19:12:47,722 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1740 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:47,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1741 Valid, 48 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:12:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-31 19:12:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 531. [2022-01-31 19:12:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 525 states have (on average 1.2019047619047618) internal successors, (631), 525 states have internal predecessors, (631), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 636 transitions. [2022-01-31 19:12:47,907 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 636 transitions. Word has length 521 [2022-01-31 19:12:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:47,908 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 636 transitions. [2022-01-31 19:12:47,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 104 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 636 transitions. [2022-01-31 19:12:47,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-01-31 19:12:47,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:47,909 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:47,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 19:12:47,909 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:47,910 INFO L85 PathProgramCache]: Analyzing trace with hash -661466128, now seen corresponding path program 102 times [2022-01-31 19:12:47,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:47,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797947456] [2022-01-31 19:12:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:47,911 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:47,911 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:47,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:47,931 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:51,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:51,212 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:51,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797947456] [2022-01-31 19:12:51,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [797947456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:51,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:51,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 19:12:51,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115965743] [2022-01-31 19:12:51,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:51,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 19:12:51,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 19:12:51,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 19:12:51,215 INFO L87 Difference]: Start difference. First operand 531 states and 636 transitions. Second operand has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 105 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:55,512 INFO L93 Difference]: Finished difference Result 859 states and 1072 transitions. [2022-01-31 19:12:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 19:12:55,512 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 105 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 526 [2022-01-31 19:12:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:55,513 INFO L225 Difference]: With dead ends: 859 [2022-01-31 19:12:55,513 INFO L226 Difference]: Without dead ends: 539 [2022-01-31 19:12:55,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 19:12:55,515 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1604 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:55,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 58 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:12:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-31 19:12:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 536. [2022-01-31 19:12:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 530 states have (on average 1.2018867924528303) internal successors, (637), 530 states have internal predecessors, (637), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 642 transitions. [2022-01-31 19:12:55,719 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 642 transitions. Word has length 526 [2022-01-31 19:12:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:55,719 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 642 transitions. [2022-01-31 19:12:55,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 105 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 642 transitions. [2022-01-31 19:12:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-31 19:12:55,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:55,721 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:55,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 19:12:55,721 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:55,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2135236797, now seen corresponding path program 103 times [2022-01-31 19:12:55,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:55,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872780971] [2022-01-31 19:12:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:55,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:55,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:55,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:55,745 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:59,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:59,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:59,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872780971] [2022-01-31 19:12:59,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [872780971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:59,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:59,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 19:12:59,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049836169] [2022-01-31 19:12:59,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:59,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 19:12:59,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:59,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 19:12:59,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 19:12:59,056 INFO L87 Difference]: Start difference. First operand 536 states and 642 transitions. Second operand has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:04,189 INFO L93 Difference]: Finished difference Result 867 states and 1082 transitions. [2022-01-31 19:13:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 19:13:04,189 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 531 [2022-01-31 19:13:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:04,190 INFO L225 Difference]: With dead ends: 867 [2022-01-31 19:13:04,190 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 19:13:04,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 19:13:04,205 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1732 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:04,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 53 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:13:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 19:13:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 541. [2022-01-31 19:13:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 535 states have (on average 1.2018691588785047) internal successors, (643), 535 states have internal predecessors, (643), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 648 transitions. [2022-01-31 19:13:04,414 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 648 transitions. Word has length 531 [2022-01-31 19:13:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:04,414 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 648 transitions. [2022-01-31 19:13:04,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 648 transitions. [2022-01-31 19:13:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-01-31 19:13:04,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:04,416 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:04,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 19:13:04,416 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:04,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:04,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1842613076, now seen corresponding path program 104 times [2022-01-31 19:13:04,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:04,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020333478] [2022-01-31 19:13:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:04,417 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:04,417 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:04,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:04,439 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:07,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:13:07,892 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:07,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020333478] [2022-01-31 19:13:07,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020333478] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:07,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:07,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 19:13:07,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840620176] [2022-01-31 19:13:07,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:07,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 19:13:07,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 19:13:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 19:13:07,895 INFO L87 Difference]: Start difference. First operand 541 states and 648 transitions. Second operand has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 107 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:12,801 INFO L93 Difference]: Finished difference Result 875 states and 1092 transitions. [2022-01-31 19:13:12,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 19:13:12,802 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 107 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 536 [2022-01-31 19:13:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:12,803 INFO L225 Difference]: With dead ends: 875 [2022-01-31 19:13:12,803 INFO L226 Difference]: Without dead ends: 549 [2022-01-31 19:13:12,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 19:13:12,804 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1740 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:12,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1741 Valid, 63 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:13:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-31 19:13:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 546. [2022-01-31 19:13:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 540 states have (on average 1.201851851851852) internal successors, (649), 540 states have internal predecessors, (649), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 654 transitions. [2022-01-31 19:13:13,002 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 654 transitions. Word has length 536 [2022-01-31 19:13:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:13,002 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 654 transitions. [2022-01-31 19:13:13,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 107 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 654 transitions. [2022-01-31 19:13:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2022-01-31 19:13:13,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:13,004 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:13,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 19:13:13,004 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash 546664793, now seen corresponding path program 105 times [2022-01-31 19:13:13,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:13,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340157004] [2022-01-31 19:13:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:13,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:13,006 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:13,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:13,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:16,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:13:16,132 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:16,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340157004] [2022-01-31 19:13:16,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [340157004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:16,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:16,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 19:13:16,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629900471] [2022-01-31 19:13:16,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:16,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 19:13:16,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:16,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 19:13:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 19:13:16,134 INFO L87 Difference]: Start difference. First operand 546 states and 654 transitions. Second operand has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 108 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:20,952 INFO L93 Difference]: Finished difference Result 883 states and 1102 transitions. [2022-01-31 19:13:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 19:13:20,953 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 108 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 541 [2022-01-31 19:13:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:20,954 INFO L225 Difference]: With dead ends: 883 [2022-01-31 19:13:20,954 INFO L226 Difference]: Without dead ends: 554 [2022-01-31 19:13:20,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 19:13:20,956 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2147 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2148 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:20,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2148 Valid, 48 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [752 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:13:20,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-31 19:13:21,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 551. [2022-01-31 19:13:21,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 545 states have (on average 1.201834862385321) internal successors, (655), 545 states have internal predecessors, (655), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 660 transitions. [2022-01-31 19:13:21,156 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 660 transitions. Word has length 541 [2022-01-31 19:13:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:21,156 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 660 transitions. [2022-01-31 19:13:21,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 108 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 660 transitions. [2022-01-31 19:13:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2022-01-31 19:13:21,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:21,158 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:21,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 19:13:21,158 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:21,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:21,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1964457288, now seen corresponding path program 106 times [2022-01-31 19:13:21,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:21,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447195099] [2022-01-31 19:13:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:21,160 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:21,160 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:21,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:21,183 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:24,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:13:24,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:24,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447195099] [2022-01-31 19:13:24,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [447195099] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:24,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:24,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 19:13:24,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692587414] [2022-01-31 19:13:24,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:24,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 19:13:24,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:24,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 19:13:24,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 19:13:24,623 INFO L87 Difference]: Start difference. First operand 551 states and 660 transitions. Second operand has 110 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 109 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:29,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:29,532 INFO L93 Difference]: Finished difference Result 891 states and 1112 transitions. [2022-01-31 19:13:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 19:13:29,532 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 109 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 546 [2022-01-31 19:13:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:29,533 INFO L225 Difference]: With dead ends: 891 [2022-01-31 19:13:29,533 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 19:13:29,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 19:13:29,535 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1846 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1847 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:29,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1847 Valid, 63 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:13:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 19:13:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 556. [2022-01-31 19:13:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 550 states have (on average 1.201818181818182) internal successors, (661), 550 states have internal predecessors, (661), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:29,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 666 transitions. [2022-01-31 19:13:29,750 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 666 transitions. Word has length 546 [2022-01-31 19:13:29,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:29,750 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 666 transitions. [2022-01-31 19:13:29,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 109 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:29,750 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 666 transitions. [2022-01-31 19:13:29,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2022-01-31 19:13:29,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:29,751 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:29,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 19:13:29,752 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:29,752 INFO L85 PathProgramCache]: Analyzing trace with hash 563421685, now seen corresponding path program 107 times [2022-01-31 19:13:29,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:29,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541009179] [2022-01-31 19:13:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:29,753 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:29,753 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:29,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:29,776 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:32,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:13:32,094 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:32,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541009179] [2022-01-31 19:13:32,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [541009179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:32,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:32,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 19:13:32,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962711399] [2022-01-31 19:13:32,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:32,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 19:13:32,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:32,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 19:13:32,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 19:13:32,098 INFO L87 Difference]: Start difference. First operand 556 states and 666 transitions. Second operand has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 110 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:36,584 INFO L93 Difference]: Finished difference Result 899 states and 1122 transitions. [2022-01-31 19:13:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 19:13:36,584 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 110 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 551 [2022-01-31 19:13:36,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:36,585 INFO L225 Difference]: With dead ends: 899 [2022-01-31 19:13:36,585 INFO L226 Difference]: Without dead ends: 564 [2022-01-31 19:13:36,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 19:13:36,587 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1803 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1804 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:36,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1804 Valid, 48 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:13:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-31 19:13:36,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 561. [2022-01-31 19:13:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 555 states have (on average 1.2018018018018017) internal successors, (667), 555 states have internal predecessors, (667), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 672 transitions. [2022-01-31 19:13:36,817 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 672 transitions. Word has length 551 [2022-01-31 19:13:36,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:36,817 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 672 transitions. [2022-01-31 19:13:36,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 110 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 672 transitions. [2022-01-31 19:13:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2022-01-31 19:13:36,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:36,819 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:36,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 19:13:36,819 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1277901340, now seen corresponding path program 108 times [2022-01-31 19:13:36,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:36,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135084027] [2022-01-31 19:13:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:36,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:36,821 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:36,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:36,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:39,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:39,239 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 19:13:39,240 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:39,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135084027] [2022-01-31 19:13:39,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2135084027] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:39,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:39,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 19:13:39,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696679998] [2022-01-31 19:13:39,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:39,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 19:13:39,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:39,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 19:13:39,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 19:13:39,242 INFO L87 Difference]: Start difference. First operand 561 states and 672 transitions. Second operand has 112 states, 112 states have (on average 2.0625) internal successors, (231), 111 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:44,037 INFO L93 Difference]: Finished difference Result 907 states and 1132 transitions. [2022-01-31 19:13:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 19:13:44,037 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0625) internal successors, (231), 111 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 556 [2022-01-31 19:13:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:44,038 INFO L225 Difference]: With dead ends: 907 [2022-01-31 19:13:44,038 INFO L226 Difference]: Without dead ends: 569 [2022-01-31 19:13:44,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 19:13:44,040 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1835 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1836 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:44,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1836 Valid, 58 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:13:44,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-31 19:13:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 566. [2022-01-31 19:13:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 560 states have (on average 1.2017857142857142) internal successors, (673), 560 states have internal predecessors, (673), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 678 transitions. [2022-01-31 19:13:44,254 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 678 transitions. Word has length 556 [2022-01-31 19:13:44,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:44,255 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 678 transitions. [2022-01-31 19:13:44,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0625) internal successors, (231), 111 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 678 transitions. [2022-01-31 19:13:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-01-31 19:13:44,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:44,256 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:44,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 19:13:44,257 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1923740305, now seen corresponding path program 109 times [2022-01-31 19:13:44,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:44,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13871920] [2022-01-31 19:13:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:44,258 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:44,258 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:44,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:44,284 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:48,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:13:48,180 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:48,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13871920] [2022-01-31 19:13:48,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [13871920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:48,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:48,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 19:13:48,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097320854] [2022-01-31 19:13:48,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:48,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 19:13:48,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 19:13:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 19:13:48,183 INFO L87 Difference]: Start difference. First operand 566 states and 678 transitions. Second operand has 113 states, 113 states have (on average 2.061946902654867) internal successors, (233), 112 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:53,683 INFO L93 Difference]: Finished difference Result 915 states and 1142 transitions. [2022-01-31 19:13:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 19:13:53,684 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.061946902654867) internal successors, (233), 112 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 561 [2022-01-31 19:13:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:53,684 INFO L225 Difference]: With dead ends: 915 [2022-01-31 19:13:53,685 INFO L226 Difference]: Without dead ends: 574 [2022-01-31 19:13:53,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 19:13:53,686 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2266 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2267 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:53,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2267 Valid, 33 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:13:53,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-31 19:13:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 571. [2022-01-31 19:13:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 565 states have (on average 1.2017699115044247) internal successors, (679), 565 states have internal predecessors, (679), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 684 transitions. [2022-01-31 19:13:53,914 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 684 transitions. Word has length 561 [2022-01-31 19:13:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:53,914 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 684 transitions. [2022-01-31 19:13:53,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.061946902654867) internal successors, (233), 112 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 684 transitions. [2022-01-31 19:13:53,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2022-01-31 19:13:53,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:53,916 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:53,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 19:13:53,916 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:53,916 INFO L85 PathProgramCache]: Analyzing trace with hash -311053952, now seen corresponding path program 110 times [2022-01-31 19:13:53,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:53,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406038226] [2022-01-31 19:13:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:53,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:53,917 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:53,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:53,942 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:57,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:13:57,423 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:57,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406038226] [2022-01-31 19:13:57,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [406038226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:57,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:57,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 19:13:57,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863619081] [2022-01-31 19:13:57,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:57,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 19:13:57,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 19:13:57,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 19:13:57,431 INFO L87 Difference]: Start difference. First operand 571 states and 684 transitions. Second operand has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 113 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:03,370 INFO L93 Difference]: Finished difference Result 923 states and 1152 transitions. [2022-01-31 19:14:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 19:14:03,371 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 113 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 566 [2022-01-31 19:14:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:03,372 INFO L225 Difference]: With dead ends: 923 [2022-01-31 19:14:03,372 INFO L226 Difference]: Without dead ends: 579 [2022-01-31 19:14:03,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 19:14:03,374 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1875 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:03,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1876 Valid, 63 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:14:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-31 19:14:03,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 576. [2022-01-31 19:14:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 570 states have (on average 1.2017543859649122) internal successors, (685), 570 states have internal predecessors, (685), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:03,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 690 transitions. [2022-01-31 19:14:03,597 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 690 transitions. Word has length 566 [2022-01-31 19:14:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:03,597 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 690 transitions. [2022-01-31 19:14:03,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 113 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 690 transitions. [2022-01-31 19:14:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2022-01-31 19:14:03,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:03,600 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:03,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 19:14:03,600 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:03,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1924768557, now seen corresponding path program 111 times [2022-01-31 19:14:03,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:03,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280215759] [2022-01-31 19:14:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:03,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:03,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:03,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:03,631 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:07,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:07,503 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:07,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280215759] [2022-01-31 19:14:07,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [280215759] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:07,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:07,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 19:14:07,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334538864] [2022-01-31 19:14:07,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:07,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 19:14:07,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:07,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 19:14:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 19:14:07,506 INFO L87 Difference]: Start difference. First operand 576 states and 690 transitions. Second operand has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 114 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:13,497 INFO L93 Difference]: Finished difference Result 931 states and 1162 transitions. [2022-01-31 19:14:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 19:14:13,497 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 114 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 571 [2022-01-31 19:14:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:13,498 INFO L225 Difference]: With dead ends: 931 [2022-01-31 19:14:13,498 INFO L226 Difference]: Without dead ends: 584 [2022-01-31 19:14:13,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 19:14:13,501 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1931 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1932 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:13,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1932 Valid, 58 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:14:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-31 19:14:13,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 581. [2022-01-31 19:14:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 575 states have (on average 1.2017391304347826) internal successors, (691), 575 states have internal predecessors, (691), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 696 transitions. [2022-01-31 19:14:13,726 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 696 transitions. Word has length 571 [2022-01-31 19:14:13,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:13,726 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 696 transitions. [2022-01-31 19:14:13,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 114 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 696 transitions. [2022-01-31 19:14:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2022-01-31 19:14:13,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:13,728 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:13,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 19:14:13,728 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:13,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:13,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1373476636, now seen corresponding path program 112 times [2022-01-31 19:14:13,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:13,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113235762] [2022-01-31 19:14:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:13,731 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:13,731 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:13,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:13,761 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:17,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:17,992 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 19:14:17,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:17,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113235762] [2022-01-31 19:14:17,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1113235762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:17,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:17,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 19:14:17,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915448530] [2022-01-31 19:14:17,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:17,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 19:14:17,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:17,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 19:14:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 19:14:17,996 INFO L87 Difference]: Start difference. First operand 581 states and 696 transitions. Second operand has 116 states, 116 states have (on average 2.060344827586207) internal successors, (239), 115 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:23,793 INFO L93 Difference]: Finished difference Result 939 states and 1172 transitions. [2022-01-31 19:14:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 19:14:23,793 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.060344827586207) internal successors, (239), 115 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 576 [2022-01-31 19:14:23,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:23,794 INFO L225 Difference]: With dead ends: 939 [2022-01-31 19:14:23,794 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 19:14:23,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 19:14:23,796 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1987 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1988 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:23,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1988 Valid, 48 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:14:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 19:14:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 586. [2022-01-31 19:14:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 580 states have (on average 1.2017241379310344) internal successors, (697), 580 states have internal predecessors, (697), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 702 transitions. [2022-01-31 19:14:24,037 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 702 transitions. Word has length 576 [2022-01-31 19:14:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:24,038 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 702 transitions. [2022-01-31 19:14:24,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.060344827586207) internal successors, (239), 115 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 702 transitions. [2022-01-31 19:14:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2022-01-31 19:14:24,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:24,040 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:24,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 19:14:24,043 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:24,043 INFO L85 PathProgramCache]: Analyzing trace with hash 187298761, now seen corresponding path program 113 times [2022-01-31 19:14:24,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:24,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630169516] [2022-01-31 19:14:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:24,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:24,045 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:24,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:24,071 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:28,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:28,427 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:28,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630169516] [2022-01-31 19:14:28,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1630169516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:28,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:28,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 19:14:28,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279785860] [2022-01-31 19:14:28,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:28,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 19:14:28,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:28,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 19:14:28,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 19:14:28,430 INFO L87 Difference]: Start difference. First operand 586 states and 702 transitions. Second operand has 117 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 116 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:34,308 INFO L93 Difference]: Finished difference Result 947 states and 1182 transitions. [2022-01-31 19:14:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 19:14:34,308 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 116 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 581 [2022-01-31 19:14:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:34,309 INFO L225 Difference]: With dead ends: 947 [2022-01-31 19:14:34,309 INFO L226 Difference]: Without dead ends: 594 [2022-01-31 19:14:34,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 19:14:34,311 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2295 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2296 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:34,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2296 Valid, 38 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:14:34,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-31 19:14:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 591. [2022-01-31 19:14:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 585 states have (on average 1.2017094017094017) internal successors, (703), 585 states have internal predecessors, (703), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:34,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 708 transitions. [2022-01-31 19:14:34,550 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 708 transitions. Word has length 581 [2022-01-31 19:14:34,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:34,550 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 708 transitions. [2022-01-31 19:14:34,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 116 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 708 transitions. [2022-01-31 19:14:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-01-31 19:14:34,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:34,552 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:34,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 19:14:34,552 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:34,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:34,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1257529272, now seen corresponding path program 114 times [2022-01-31 19:14:34,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:34,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387078402] [2022-01-31 19:14:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:34,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:34,554 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:34,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:34,583 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:38,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:38,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:38,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387078402] [2022-01-31 19:14:38,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [387078402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:38,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:38,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 19:14:38,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020182426] [2022-01-31 19:14:38,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:38,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 19:14:38,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:38,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 19:14:38,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 19:14:38,863 INFO L87 Difference]: Start difference. First operand 591 states and 708 transitions. Second operand has 118 states, 118 states have (on average 2.059322033898305) internal successors, (243), 117 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:44,406 INFO L93 Difference]: Finished difference Result 955 states and 1192 transitions. [2022-01-31 19:14:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 19:14:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.059322033898305) internal successors, (243), 117 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 586 [2022-01-31 19:14:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:44,407 INFO L225 Difference]: With dead ends: 955 [2022-01-31 19:14:44,407 INFO L226 Difference]: Without dead ends: 599 [2022-01-31 19:14:44,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 19:14:44,409 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2480 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2481 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:44,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2481 Valid, 38 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:14:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-31 19:14:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 596. [2022-01-31 19:14:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 590 states have (on average 1.2016949152542373) internal successors, (709), 590 states have internal predecessors, (709), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 714 transitions. [2022-01-31 19:14:44,652 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 714 transitions. Word has length 586 [2022-01-31 19:14:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:44,652 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 714 transitions. [2022-01-31 19:14:44,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.059322033898305) internal successors, (243), 117 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 714 transitions. [2022-01-31 19:14:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2022-01-31 19:14:44,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:44,654 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:44,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 19:14:44,654 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:44,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash -874470299, now seen corresponding path program 115 times [2022-01-31 19:14:44,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:44,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138535648] [2022-01-31 19:14:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:44,656 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:44,656 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:44,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:44,688 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:47,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:47,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138535648] [2022-01-31 19:14:47,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2138535648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:47,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:47,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 19:14:47,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015553316] [2022-01-31 19:14:47,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:47,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 19:14:47,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 19:14:47,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 19:14:47,392 INFO L87 Difference]: Start difference. First operand 596 states and 714 transitions. Second operand has 119 states, 119 states have (on average 2.0588235294117645) internal successors, (245), 118 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:53,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:53,051 INFO L93 Difference]: Finished difference Result 963 states and 1202 transitions. [2022-01-31 19:14:53,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 19:14:53,052 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0588235294117645) internal successors, (245), 118 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 591 [2022-01-31 19:14:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:53,053 INFO L225 Difference]: With dead ends: 963 [2022-01-31 19:14:53,053 INFO L226 Difference]: Without dead ends: 604 [2022-01-31 19:14:53,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 19:14:53,055 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2002 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2003 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:53,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2003 Valid, 48 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:14:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-31 19:14:53,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 601. [2022-01-31 19:14:53,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 595 states have (on average 1.2016806722689075) internal successors, (715), 595 states have internal predecessors, (715), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 720 transitions. [2022-01-31 19:14:53,325 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 720 transitions. Word has length 591 [2022-01-31 19:14:53,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:53,325 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 720 transitions. [2022-01-31 19:14:53,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0588235294117645) internal successors, (245), 118 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:53,325 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 720 transitions. [2022-01-31 19:14:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-01-31 19:14:53,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:53,327 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:53,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 19:14:53,327 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:53,328 INFO L85 PathProgramCache]: Analyzing trace with hash -192178260, now seen corresponding path program 116 times [2022-01-31 19:14:53,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:53,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167623042] [2022-01-31 19:14:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:53,329 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:53,329 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:53,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:53,366 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:57,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:57,023 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167623042] [2022-01-31 19:14:57,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [167623042] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:57,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:57,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 19:14:57,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827605172] [2022-01-31 19:14:57,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:57,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 19:14:57,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 19:14:57,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 19:14:57,025 INFO L87 Difference]: Start difference. First operand 601 states and 720 transitions. Second operand has 120 states, 120 states have (on average 2.058333333333333) internal successors, (247), 119 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:03,223 INFO L93 Difference]: Finished difference Result 971 states and 1212 transitions. [2022-01-31 19:15:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 19:15:03,224 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.058333333333333) internal successors, (247), 119 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 596 [2022-01-31 19:15:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:03,224 INFO L225 Difference]: With dead ends: 971 [2022-01-31 19:15:03,225 INFO L226 Difference]: Without dead ends: 609 [2022-01-31 19:15:03,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 19:15:03,227 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2235 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2236 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:03,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2236 Valid, 48 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:15:03,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-01-31 19:15:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 606. [2022-01-31 19:15:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 600 states have (on average 1.2016666666666667) internal successors, (721), 600 states have internal predecessors, (721), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 726 transitions. [2022-01-31 19:15:03,478 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 726 transitions. Word has length 596 [2022-01-31 19:15:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:03,478 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 726 transitions. [2022-01-31 19:15:03,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.058333333333333) internal successors, (247), 119 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 726 transitions. [2022-01-31 19:15:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2022-01-31 19:15:03,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:03,480 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:03,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 19:15:03,480 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:03,480 INFO L85 PathProgramCache]: Analyzing trace with hash 121861377, now seen corresponding path program 117 times [2022-01-31 19:15:03,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:03,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601822995] [2022-01-31 19:15:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:03,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:03,482 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:03,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:03,515 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:08,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:15:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:08,161 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 19:15:08,161 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:15:08,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601822995] [2022-01-31 19:15:08,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601822995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:15:08,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:15:08,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 19:15:08,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293469754] [2022-01-31 19:15:08,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:15:08,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 19:15:08,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:15:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 19:15:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 19:15:08,165 INFO L87 Difference]: Start difference. First operand 606 states and 726 transitions. Second operand has 121 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 120 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:14,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:14,255 INFO L93 Difference]: Finished difference Result 979 states and 1222 transitions. [2022-01-31 19:15:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 19:15:14,256 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 120 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 601 [2022-01-31 19:15:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:14,268 INFO L225 Difference]: With dead ends: 979 [2022-01-31 19:15:14,268 INFO L226 Difference]: Without dead ends: 614 [2022-01-31 19:15:14,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 19:15:14,271 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2060 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2061 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:14,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2061 Valid, 53 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:15:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-31 19:15:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 611. [2022-01-31 19:15:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 605 states have (on average 1.2016528925619834) internal successors, (727), 605 states have internal predecessors, (727), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 732 transitions. [2022-01-31 19:15:14,549 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 732 transitions. Word has length 601 [2022-01-31 19:15:14,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:14,549 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 732 transitions. [2022-01-31 19:15:14,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 120 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 732 transitions. [2022-01-31 19:15:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2022-01-31 19:15:14,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:14,552 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:14,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 19:15:14,553 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash 243044112, now seen corresponding path program 118 times [2022-01-31 19:15:14,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:14,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989405831] [2022-01-31 19:15:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:14,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:14,554 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:14,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:14,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:18,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:15:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:15:18,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:15:18,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989405831] [2022-01-31 19:15:18,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1989405831] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:15:18,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:15:18,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 19:15:18,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344581004] [2022-01-31 19:15:18,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:15:18,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 19:15:18,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:15:18,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 19:15:18,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 19:15:18,374 INFO L87 Difference]: Start difference. First operand 611 states and 732 transitions. Second operand has 122 states, 122 states have (on average 2.057377049180328) internal successors, (251), 121 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:24,498 INFO L93 Difference]: Finished difference Result 987 states and 1232 transitions. [2022-01-31 19:15:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 19:15:24,499 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.057377049180328) internal successors, (251), 121 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 606 [2022-01-31 19:15:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:24,500 INFO L225 Difference]: With dead ends: 987 [2022-01-31 19:15:24,500 INFO L226 Difference]: Without dead ends: 619 [2022-01-31 19:15:24,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 19:15:24,502 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2308 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2309 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:24,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2309 Valid, 53 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:15:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-31 19:15:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 616. [2022-01-31 19:15:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 610 states have (on average 1.201639344262295) internal successors, (733), 610 states have internal predecessors, (733), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 738 transitions. [2022-01-31 19:15:24,793 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 738 transitions. Word has length 606 [2022-01-31 19:15:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:24,794 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 738 transitions. [2022-01-31 19:15:24,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.057377049180328) internal successors, (251), 121 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 738 transitions. [2022-01-31 19:15:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-01-31 19:15:24,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:24,796 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:24,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 19:15:24,796 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -298310243, now seen corresponding path program 119 times [2022-01-31 19:15:24,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:24,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143298741] [2022-01-31 19:15:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:24,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:24,797 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:24,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:24,830 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:15:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:29,040 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 19:15:29,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:15:29,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143298741] [2022-01-31 19:15:29,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1143298741] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:15:29,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:15:29,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 19:15:29,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205037085] [2022-01-31 19:15:29,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:15:29,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 19:15:29,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:15:29,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 19:15:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 19:15:29,044 INFO L87 Difference]: Start difference. First operand 616 states and 738 transitions. Second operand has 123 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:35,589 INFO L93 Difference]: Finished difference Result 995 states and 1242 transitions. [2022-01-31 19:15:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 19:15:35,589 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 611 [2022-01-31 19:15:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:35,590 INFO L225 Difference]: With dead ends: 995 [2022-01-31 19:15:35,590 INFO L226 Difference]: Without dead ends: 624 [2022-01-31 19:15:35,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 19:15:35,592 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2574 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 898 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2575 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 898 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:35,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2575 Valid, 53 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [898 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:15:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-31 19:15:35,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 621. [2022-01-31 19:15:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 615 states have (on average 1.2016260162601626) internal successors, (739), 615 states have internal predecessors, (739), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:35,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 744 transitions. [2022-01-31 19:15:35,853 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 744 transitions. Word has length 611 [2022-01-31 19:15:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:35,853 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 744 transitions. [2022-01-31 19:15:35,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 744 transitions. [2022-01-31 19:15:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-01-31 19:15:35,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:35,856 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:35,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 19:15:35,856 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:35,856 INFO L85 PathProgramCache]: Analyzing trace with hash 943244916, now seen corresponding path program 120 times [2022-01-31 19:15:35,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:35,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723187571] [2022-01-31 19:15:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:35,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:35,857 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:35,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:35,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:39,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:15:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:15:39,752 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:15:39,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723187571] [2022-01-31 19:15:39,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1723187571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:15:39,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:15:39,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 19:15:39,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698430588] [2022-01-31 19:15:39,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:15:39,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 19:15:39,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:15:39,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 19:15:39,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 19:15:39,756 INFO L87 Difference]: Start difference. First operand 621 states and 744 transitions. Second operand has 124 states, 124 states have (on average 2.056451612903226) internal successors, (255), 123 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:46,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:46,660 INFO L93 Difference]: Finished difference Result 1003 states and 1252 transitions. [2022-01-31 19:15:46,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 19:15:46,660 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.056451612903226) internal successors, (255), 123 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 616 [2022-01-31 19:15:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:46,661 INFO L225 Difference]: With dead ends: 1003 [2022-01-31 19:15:46,662 INFO L226 Difference]: Without dead ends: 629 [2022-01-31 19:15:46,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 19:15:46,664 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1934 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1935 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:46,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1935 Valid, 63 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:15:46,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-31 19:15:46,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 626. [2022-01-31 19:15:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 620 states have (on average 1.2016129032258065) internal successors, (745), 620 states have internal predecessors, (745), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 750 transitions. [2022-01-31 19:15:46,931 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 750 transitions. Word has length 616 [2022-01-31 19:15:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:46,931 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 750 transitions. [2022-01-31 19:15:46,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.056451612903226) internal successors, (255), 123 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 750 transitions. [2022-01-31 19:15:46,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-01-31 19:15:46,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:46,933 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:46,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 19:15:46,933 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:46,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1406896583, now seen corresponding path program 121 times [2022-01-31 19:15:46,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:46,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892102413] [2022-01-31 19:15:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:46,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:46,935 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:46,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:46,968 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:50,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:15:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:15:50,214 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:15:50,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892102413] [2022-01-31 19:15:50,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [892102413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:15:50,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:15:50,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 19:15:50,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536205865] [2022-01-31 19:15:50,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:15:50,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 19:15:50,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:15:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 19:15:50,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 19:15:50,218 INFO L87 Difference]: Start difference. First operand 626 states and 750 transitions. Second operand has 125 states, 125 states have (on average 2.056) internal successors, (257), 124 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:57,075 INFO L93 Difference]: Finished difference Result 1011 states and 1262 transitions. [2022-01-31 19:15:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 19:15:57,075 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.056) internal successors, (257), 124 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 621 [2022-01-31 19:15:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:57,076 INFO L225 Difference]: With dead ends: 1011 [2022-01-31 19:15:57,077 INFO L226 Difference]: Without dead ends: 634 [2022-01-31 19:15:57,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 19:15:57,079 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1915 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1916 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:57,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1916 Valid, 58 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:15:57,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-31 19:15:57,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 631. [2022-01-31 19:15:57,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 625 states have (on average 1.2016) internal successors, (751), 625 states have internal predecessors, (751), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 756 transitions. [2022-01-31 19:15:57,390 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 756 transitions. Word has length 621 [2022-01-31 19:15:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:57,390 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 756 transitions. [2022-01-31 19:15:57,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.056) internal successors, (257), 124 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:57,391 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 756 transitions. [2022-01-31 19:15:57,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2022-01-31 19:15:57,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:57,393 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:57,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 19:15:57,393 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash 513441240, now seen corresponding path program 122 times [2022-01-31 19:15:57,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:57,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803753550] [2022-01-31 19:15:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:57,394 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:57,395 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:57,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:57,427 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:01,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:16:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:16:01,738 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:16:01,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803753550] [2022-01-31 19:16:01,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803753550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:16:01,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:16:01,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 19:16:01,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584574058] [2022-01-31 19:16:01,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:16:01,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 19:16:01,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:16:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 19:16:01,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 19:16:01,742 INFO L87 Difference]: Start difference. First operand 631 states and 756 transitions. Second operand has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:07,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:16:07,933 INFO L93 Difference]: Finished difference Result 1019 states and 1272 transitions. [2022-01-31 19:16:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 19:16:07,933 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 626 [2022-01-31 19:16:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:16:07,934 INFO L225 Difference]: With dead ends: 1019 [2022-01-31 19:16:07,934 INFO L226 Difference]: Without dead ends: 639 [2022-01-31 19:16:07,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 19:16:07,936 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2268 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2269 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:16:07,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2269 Valid, 33 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:16:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-31 19:16:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 636. [2022-01-31 19:16:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 630 states have (on average 1.2015873015873015) internal successors, (757), 630 states have internal predecessors, (757), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:16:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 762 transitions. [2022-01-31 19:16:08,235 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 762 transitions. Word has length 626 [2022-01-31 19:16:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:16:08,236 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 762 transitions. [2022-01-31 19:16:08,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 762 transitions. [2022-01-31 19:16:08,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2022-01-31 19:16:08,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:16:08,238 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:16:08,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 19:16:08,238 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:16:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:16:08,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2098321707, now seen corresponding path program 123 times [2022-01-31 19:16:08,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:16:08,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115674340] [2022-01-31 19:16:08,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:16:08,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:16:08,239 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:16:08,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:16:08,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:16:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:12,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:16:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:12,846 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 19:16:12,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:16:12,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115674340] [2022-01-31 19:16:12,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [115674340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:16:12,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:16:12,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 19:16:12,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511949929] [2022-01-31 19:16:12,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:16:12,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 19:16:12,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:16:12,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 19:16:12,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 19:16:12,849 INFO L87 Difference]: Start difference. First operand 636 states and 762 transitions. Second operand has 127 states, 127 states have (on average 2.0551181102362204) internal successors, (261), 126 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:19,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:16:19,484 INFO L93 Difference]: Finished difference Result 1027 states and 1282 transitions. [2022-01-31 19:16:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 19:16:19,485 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0551181102362204) internal successors, (261), 126 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 631 [2022-01-31 19:16:19,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:16:19,485 INFO L225 Difference]: With dead ends: 1027 [2022-01-31 19:16:19,486 INFO L226 Difference]: Without dead ends: 644 [2022-01-31 19:16:19,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 19:16:19,488 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2174 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2175 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:16:19,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2175 Valid, 63 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:16:19,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-01-31 19:16:19,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 641. [2022-01-31 19:16:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 635 states have (on average 1.2015748031496063) internal successors, (763), 635 states have internal predecessors, (763), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:16:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 768 transitions. [2022-01-31 19:16:19,764 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 768 transitions. Word has length 631 [2022-01-31 19:16:19,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:16:19,764 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 768 transitions. [2022-01-31 19:16:19,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0551181102362204) internal successors, (261), 126 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 768 transitions. [2022-01-31 19:16:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2022-01-31 19:16:19,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:16:19,767 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:16:19,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 19:16:19,767 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:16:19,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:16:19,767 INFO L85 PathProgramCache]: Analyzing trace with hash -906234564, now seen corresponding path program 124 times [2022-01-31 19:16:19,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:16:19,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859705702] [2022-01-31 19:16:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:16:19,768 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:16:19,769 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:16:19,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:16:19,805 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:16:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:24,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:16:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:16:24,580 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:16:24,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859705702] [2022-01-31 19:16:24,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [859705702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:16:24,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:16:24,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 19:16:24,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414704665] [2022-01-31 19:16:24,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:16:24,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 19:16:24,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:16:24,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 19:16:24,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 19:16:24,585 INFO L87 Difference]: Start difference. First operand 641 states and 768 transitions. Second operand has 128 states, 128 states have (on average 2.0546875) internal successors, (263), 127 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:16:31,862 INFO L93 Difference]: Finished difference Result 1035 states and 1292 transitions. [2022-01-31 19:16:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 19:16:31,863 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0546875) internal successors, (263), 127 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 636 [2022-01-31 19:16:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:16:31,864 INFO L225 Difference]: With dead ends: 1035 [2022-01-31 19:16:31,864 INFO L226 Difference]: Without dead ends: 649 [2022-01-31 19:16:31,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 19:16:31,866 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2452 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2453 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:16:31,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2453 Valid, 43 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:16:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-31 19:16:32,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 646. [2022-01-31 19:16:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 640 states have (on average 1.2015625) internal successors, (769), 640 states have internal predecessors, (769), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:16:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 774 transitions. [2022-01-31 19:16:32,171 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 774 transitions. Word has length 636 [2022-01-31 19:16:32,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:16:32,172 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 774 transitions. [2022-01-31 19:16:32,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0546875) internal successors, (263), 127 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 774 transitions. [2022-01-31 19:16:32,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2022-01-31 19:16:32,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:16:32,174 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:16:32,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 19:16:32,174 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:16:32,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:16:32,174 INFO L85 PathProgramCache]: Analyzing trace with hash -419760271, now seen corresponding path program 125 times [2022-01-31 19:16:32,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:16:32,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146089170] [2022-01-31 19:16:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:16:32,180 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:16:32,195 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:16:32,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:16:32,232 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:16:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:35,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:16:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:16:35,955 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:16:35,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146089170] [2022-01-31 19:16:35,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1146089170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:16:35,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:16:35,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 19:16:35,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527245399] [2022-01-31 19:16:35,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:16:35,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 19:16:35,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:16:35,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 19:16:35,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 19:16:35,957 INFO L87 Difference]: Start difference. First operand 646 states and 774 transitions. Second operand has 129 states, 129 states have (on average 2.054263565891473) internal successors, (265), 128 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:16:42,842 INFO L93 Difference]: Finished difference Result 1043 states and 1302 transitions. [2022-01-31 19:16:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 19:16:42,842 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.054263565891473) internal successors, (265), 128 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 641 [2022-01-31 19:16:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:16:42,843 INFO L225 Difference]: With dead ends: 1043 [2022-01-31 19:16:42,844 INFO L226 Difference]: Without dead ends: 654 [2022-01-31 19:16:42,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 19:16:42,846 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2634 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 921 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2635 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 921 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:16:42,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2635 Valid, 48 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [921 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:16:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-31 19:16:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 651. [2022-01-31 19:16:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 645 states have (on average 1.2015503875968991) internal successors, (775), 645 states have internal predecessors, (775), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:16:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 780 transitions. [2022-01-31 19:16:43,133 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 780 transitions. Word has length 641 [2022-01-31 19:16:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:16:43,133 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 780 transitions. [2022-01-31 19:16:43,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.054263565891473) internal successors, (265), 128 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:43,133 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 780 transitions. [2022-01-31 19:16:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2022-01-31 19:16:43,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:16:43,135 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:16:43,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 19:16:43,135 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:16:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:16:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2110296928, now seen corresponding path program 126 times [2022-01-31 19:16:43,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:16:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626193964] [2022-01-31 19:16:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:16:43,137 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:16:43,137 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:16:43,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:16:43,170 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:16:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:47,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:16:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:16:47,497 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:16:47,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626193964] [2022-01-31 19:16:47,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [626193964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:16:47,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:16:47,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 19:16:47,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307353286] [2022-01-31 19:16:47,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:16:47,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 19:16:47,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:16:47,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 19:16:47,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 19:16:47,503 INFO L87 Difference]: Start difference. First operand 651 states and 780 transitions. Second operand has 130 states, 130 states have (on average 2.0538461538461537) internal successors, (267), 129 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:16:54,204 INFO L93 Difference]: Finished difference Result 1051 states and 1312 transitions. [2022-01-31 19:16:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 19:16:54,204 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0538461538461537) internal successors, (267), 129 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 646 [2022-01-31 19:16:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:16:54,205 INFO L225 Difference]: With dead ends: 1051 [2022-01-31 19:16:54,205 INFO L226 Difference]: Without dead ends: 659 [2022-01-31 19:16:54,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 19:16:54,208 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2048 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2049 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:16:54,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2049 Valid, 58 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:16:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-31 19:16:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 656. [2022-01-31 19:16:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 650 states have (on average 1.2015384615384614) internal successors, (781), 650 states have internal predecessors, (781), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:16:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 786 transitions. [2022-01-31 19:16:54,524 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 786 transitions. Word has length 646 [2022-01-31 19:16:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:16:54,524 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 786 transitions. [2022-01-31 19:16:54,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0538461538461537) internal successors, (267), 129 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 786 transitions. [2022-01-31 19:16:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-01-31 19:16:54,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:16:54,526 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:16:54,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 19:16:54,526 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:16:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:16:54,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1691310067, now seen corresponding path program 127 times [2022-01-31 19:16:54,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:16:54,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028647749] [2022-01-31 19:16:54,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:16:54,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:16:54,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:16:54,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:16:54,565 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:16:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:59,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:16:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:16:59,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:16:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028647749] [2022-01-31 19:16:59,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1028647749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:16:59,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:16:59,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 19:16:59,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359615326] [2022-01-31 19:16:59,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:16:59,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 19:16:59,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:16:59,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 19:16:59,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 19:16:59,539 INFO L87 Difference]: Start difference. First operand 656 states and 786 transitions. Second operand has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:17:07,935 INFO L93 Difference]: Finished difference Result 1059 states and 1322 transitions. [2022-01-31 19:17:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 19:17:07,935 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 651 [2022-01-31 19:17:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:17:07,937 INFO L225 Difference]: With dead ends: 1059 [2022-01-31 19:17:07,937 INFO L226 Difference]: Without dead ends: 664 [2022-01-31 19:17:07,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 19:17:07,940 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2365 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2366 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:17:07,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2366 Valid, 53 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:17:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-31 19:17:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 661. [2022-01-31 19:17:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 655 states have (on average 1.201526717557252) internal successors, (787), 655 states have internal predecessors, (787), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:17:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 792 transitions. [2022-01-31 19:17:08,261 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 792 transitions. Word has length 651 [2022-01-31 19:17:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:17:08,261 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 792 transitions. [2022-01-31 19:17:08,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 792 transitions. [2022-01-31 19:17:08,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2022-01-31 19:17:08,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:17:08,263 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:17:08,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 19:17:08,263 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:17:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:17:08,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1297669116, now seen corresponding path program 128 times [2022-01-31 19:17:08,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:17:08,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736702154] [2022-01-31 19:17:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:17:08,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:17:08,286 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:17:08,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:17:08,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:17:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:11,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:17:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:17:11,792 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:17:11,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736702154] [2022-01-31 19:17:11,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736702154] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:17:11,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:17:11,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 19:17:11,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97200985] [2022-01-31 19:17:11,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:17:11,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 19:17:11,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:17:11,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 19:17:11,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 19:17:11,796 INFO L87 Difference]: Start difference. First operand 661 states and 792 transitions. Second operand has 132 states, 132 states have (on average 2.053030303030303) internal successors, (271), 131 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:17:19,426 INFO L93 Difference]: Finished difference Result 1067 states and 1332 transitions. [2022-01-31 19:17:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 19:17:19,426 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.053030303030303) internal successors, (271), 131 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 656 [2022-01-31 19:17:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:17:19,427 INFO L225 Difference]: With dead ends: 1067 [2022-01-31 19:17:19,427 INFO L226 Difference]: Without dead ends: 669 [2022-01-31 19:17:19,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 19:17:19,430 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2277 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2278 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:17:19,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2278 Valid, 63 Invalid, 1708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:17:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-31 19:17:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 666. [2022-01-31 19:17:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 660 states have (on average 1.2015151515151514) internal successors, (793), 660 states have internal predecessors, (793), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:17:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 798 transitions. [2022-01-31 19:17:19,753 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 798 transitions. Word has length 656 [2022-01-31 19:17:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:17:19,754 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 798 transitions. [2022-01-31 19:17:19,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.053030303030303) internal successors, (271), 131 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:19,754 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 798 transitions. [2022-01-31 19:17:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2022-01-31 19:17:19,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:17:19,756 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:17:19,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 19:17:19,756 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:17:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:17:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash -856360791, now seen corresponding path program 129 times [2022-01-31 19:17:19,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:17:19,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125619042] [2022-01-31 19:17:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:17:19,758 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:17:19,758 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:17:19,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:17:19,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:17:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:24,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:17:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:17:24,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:17:24,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125619042] [2022-01-31 19:17:24,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125619042] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:17:24,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:17:24,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 19:17:24,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729333190] [2022-01-31 19:17:24,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:17:24,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 19:17:24,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:17:24,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 19:17:24,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 19:17:24,858 INFO L87 Difference]: Start difference. First operand 666 states and 798 transitions. Second operand has 133 states, 133 states have (on average 2.0526315789473686) internal successors, (273), 132 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:17:32,613 INFO L93 Difference]: Finished difference Result 1075 states and 1342 transitions. [2022-01-31 19:17:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 19:17:32,614 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0526315789473686) internal successors, (273), 132 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 661 [2022-01-31 19:17:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:17:32,615 INFO L225 Difference]: With dead ends: 1075 [2022-01-31 19:17:32,615 INFO L226 Difference]: Without dead ends: 674 [2022-01-31 19:17:32,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 19:17:32,617 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2657 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2658 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:17:32,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2658 Valid, 38 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:17:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-31 19:17:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 671. [2022-01-31 19:17:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 665 states have (on average 1.2015037593984963) internal successors, (799), 665 states have internal predecessors, (799), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:17:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 804 transitions. [2022-01-31 19:17:32,948 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 804 transitions. Word has length 661 [2022-01-31 19:17:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:17:32,948 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 804 transitions. [2022-01-31 19:17:32,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0526315789473686) internal successors, (273), 132 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 804 transitions. [2022-01-31 19:17:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 667 [2022-01-31 19:17:32,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:17:32,950 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:17:32,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 19:17:32,951 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:17:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:17:32,951 INFO L85 PathProgramCache]: Analyzing trace with hash -836412568, now seen corresponding path program 130 times [2022-01-31 19:17:32,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:17:32,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103373591] [2022-01-31 19:17:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:17:32,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:17:32,952 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:17:32,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:17:32,990 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:17:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:37,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:17:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:17:38,000 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:17:38,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103373591] [2022-01-31 19:17:38,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [103373591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:17:38,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:17:38,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 19:17:38,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768225974] [2022-01-31 19:17:38,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:17:38,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 19:17:38,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:17:38,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 19:17:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 19:17:38,002 INFO L87 Difference]: Start difference. First operand 671 states and 804 transitions. Second operand has 134 states, 134 states have (on average 2.0522388059701493) internal successors, (275), 133 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:17:46,705 INFO L93 Difference]: Finished difference Result 1083 states and 1352 transitions. [2022-01-31 19:17:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 19:17:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0522388059701493) internal successors, (275), 133 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 666 [2022-01-31 19:17:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:17:46,707 INFO L225 Difference]: With dead ends: 1083 [2022-01-31 19:17:46,707 INFO L226 Difference]: Without dead ends: 679 [2022-01-31 19:17:46,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 19:17:46,709 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2344 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2345 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:17:46,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2345 Valid, 43 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [826 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:17:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-31 19:17:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 676. [2022-01-31 19:17:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 670 states have (on average 1.2014925373134329) internal successors, (805), 670 states have internal predecessors, (805), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:17:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 810 transitions. [2022-01-31 19:17:47,046 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 810 transitions. Word has length 666 [2022-01-31 19:17:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:17:47,047 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 810 transitions. [2022-01-31 19:17:47,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0522388059701493) internal successors, (275), 133 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 810 transitions. [2022-01-31 19:17:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2022-01-31 19:17:47,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:17:47,049 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:17:47,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 19:17:47,049 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:17:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:17:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash 808298821, now seen corresponding path program 131 times [2022-01-31 19:17:47,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:17:47,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299318460] [2022-01-31 19:17:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:17:47,051 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:17:47,051 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:17:47,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:17:47,085 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:17:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:51,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:17:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:51,275 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 19:17:51,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:17:51,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299318460] [2022-01-31 19:17:51,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [299318460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:17:51,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:17:51,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 19:17:51,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072914733] [2022-01-31 19:17:51,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:17:51,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 19:17:51,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:17:51,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 19:17:51,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 19:17:51,278 INFO L87 Difference]: Start difference. First operand 676 states and 810 transitions. Second operand has 135 states, 135 states have (on average 2.051851851851852) internal successors, (277), 134 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:59,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:17:59,407 INFO L93 Difference]: Finished difference Result 1091 states and 1362 transitions. [2022-01-31 19:17:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 19:17:59,408 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.051851851851852) internal successors, (277), 134 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 671 [2022-01-31 19:17:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:17:59,409 INFO L225 Difference]: With dead ends: 1091 [2022-01-31 19:17:59,409 INFO L226 Difference]: Without dead ends: 684 [2022-01-31 19:17:59,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 19:17:59,411 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2439 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:17:59,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2440 Valid, 43 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:17:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-31 19:17:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 681. [2022-01-31 19:17:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 675 states have (on average 1.2014814814814814) internal successors, (811), 675 states have internal predecessors, (811), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:17:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 816 transitions. [2022-01-31 19:17:59,728 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 816 transitions. Word has length 671 [2022-01-31 19:17:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:17:59,728 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 816 transitions. [2022-01-31 19:17:59,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.051851851851852) internal successors, (277), 134 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 816 transitions. [2022-01-31 19:17:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2022-01-31 19:17:59,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:17:59,730 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:17:59,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 19:17:59,730 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:17:59,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:17:59,730 INFO L85 PathProgramCache]: Analyzing trace with hash 856445644, now seen corresponding path program 132 times [2022-01-31 19:17:59,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:17:59,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747044849] [2022-01-31 19:17:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:17:59,732 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:17:59,732 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:17:59,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:17:59,765 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:17:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:03,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:18:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:18:03,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:18:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747044849] [2022-01-31 19:18:03,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [747044849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:18:03,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:18:03,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 19:18:03,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5491973] [2022-01-31 19:18:03,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:18:03,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 19:18:03,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:18:03,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 19:18:03,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 19:18:03,325 INFO L87 Difference]: Start difference. First operand 681 states and 816 transitions. Second operand has 136 states, 136 states have (on average 2.051470588235294) internal successors, (279), 135 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:18:10,682 INFO L93 Difference]: Finished difference Result 1099 states and 1372 transitions. [2022-01-31 19:18:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 19:18:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.051470588235294) internal successors, (279), 135 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 676 [2022-01-31 19:18:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:18:10,683 INFO L225 Difference]: With dead ends: 1099 [2022-01-31 19:18:10,683 INFO L226 Difference]: Without dead ends: 689 [2022-01-31 19:18:10,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 19:18:10,686 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2498 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2499 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:18:10,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2499 Valid, 58 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:18:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-01-31 19:18:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 686. [2022-01-31 19:18:11,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 680 states have (on average 1.201470588235294) internal successors, (817), 680 states have internal predecessors, (817), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:18:11,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 822 transitions. [2022-01-31 19:18:11,020 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 822 transitions. Word has length 676 [2022-01-31 19:18:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:18:11,020 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 822 transitions. [2022-01-31 19:18:11,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.051470588235294) internal successors, (279), 135 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 822 transitions. [2022-01-31 19:18:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2022-01-31 19:18:11,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:18:11,022 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:18:11,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 19:18:11,022 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:18:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:18:11,023 INFO L85 PathProgramCache]: Analyzing trace with hash 457210337, now seen corresponding path program 133 times [2022-01-31 19:18:11,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:18:11,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158378123] [2022-01-31 19:18:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:18:11,024 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:18:11,024 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:18:11,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:18:11,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:18:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:15,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:18:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:18:15,257 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:18:15,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158378123] [2022-01-31 19:18:15,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1158378123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:18:15,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:18:15,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 19:18:15,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528580613] [2022-01-31 19:18:15,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:18:15,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 19:18:15,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:18:15,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 19:18:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 19:18:15,261 INFO L87 Difference]: Start difference. First operand 686 states and 822 transitions. Second operand has 137 states, 137 states have (on average 2.051094890510949) internal successors, (281), 136 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:18:24,391 INFO L93 Difference]: Finished difference Result 1107 states and 1382 transitions. [2022-01-31 19:18:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 19:18:24,391 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.051094890510949) internal successors, (281), 136 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 681 [2022-01-31 19:18:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:18:24,392 INFO L225 Difference]: With dead ends: 1107 [2022-01-31 19:18:24,392 INFO L226 Difference]: Without dead ends: 694 [2022-01-31 19:18:24,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 19:18:24,395 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2320 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 819 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2321 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 819 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:18:24,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2321 Valid, 58 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [819 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:18:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-01-31 19:18:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 691. [2022-01-31 19:18:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 685 states have (on average 1.2014598540145986) internal successors, (823), 685 states have internal predecessors, (823), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:18:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 828 transitions. [2022-01-31 19:18:24,717 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 828 transitions. Word has length 681 [2022-01-31 19:18:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:18:24,718 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 828 transitions. [2022-01-31 19:18:24,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.051094890510949) internal successors, (281), 136 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 828 transitions. [2022-01-31 19:18:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2022-01-31 19:18:24,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:18:24,721 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:18:24,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 19:18:24,721 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:18:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:18:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash 255216176, now seen corresponding path program 134 times [2022-01-31 19:18:24,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:18:24,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552899351] [2022-01-31 19:18:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:18:24,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:18:24,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:18:24,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:18:24,793 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:18:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:30,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:18:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:18:30,566 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:18:30,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552899351] [2022-01-31 19:18:30,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552899351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:18:30,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:18:30,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 19:18:30,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138091290] [2022-01-31 19:18:30,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:18:30,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 19:18:30,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:18:30,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 19:18:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 19:18:30,570 INFO L87 Difference]: Start difference. First operand 691 states and 828 transitions. Second operand has 138 states, 138 states have (on average 2.050724637681159) internal successors, (283), 137 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:39,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:18:39,046 INFO L93 Difference]: Finished difference Result 1115 states and 1392 transitions. [2022-01-31 19:18:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 19:18:39,046 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.050724637681159) internal successors, (283), 137 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 686 [2022-01-31 19:18:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:18:39,063 INFO L225 Difference]: With dead ends: 1115 [2022-01-31 19:18:39,063 INFO L226 Difference]: Without dead ends: 699 [2022-01-31 19:18:39,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 19:18:39,066 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2190 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:18:39,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2191 Valid, 48 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:18:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-31 19:18:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 696. [2022-01-31 19:18:39,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 690 states have (on average 1.201449275362319) internal successors, (829), 690 states have internal predecessors, (829), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:18:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 834 transitions. [2022-01-31 19:18:39,397 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 834 transitions. Word has length 686 [2022-01-31 19:18:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:18:39,397 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 834 transitions. [2022-01-31 19:18:39,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.050724637681159) internal successors, (283), 137 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 834 transitions. [2022-01-31 19:18:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2022-01-31 19:18:39,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:18:39,400 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:18:39,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 19:18:39,400 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:18:39,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:18:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1559025027, now seen corresponding path program 135 times [2022-01-31 19:18:39,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:18:39,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483472076] [2022-01-31 19:18:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:18:39,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:18:39,401 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:18:39,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:18:39,476 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:18:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:45,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:18:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:18:45,489 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:18:45,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483472076] [2022-01-31 19:18:45,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [483472076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:18:45,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:18:45,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 19:18:45,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502180794] [2022-01-31 19:18:45,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:18:45,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 19:18:45,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:18:45,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 19:18:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 19:18:45,493 INFO L87 Difference]: Start difference. First operand 696 states and 834 transitions. Second operand has 139 states, 139 states have (on average 2.050359712230216) internal successors, (285), 138 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:54,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:18:54,589 INFO L93 Difference]: Finished difference Result 1123 states and 1402 transitions. [2022-01-31 19:18:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 19:18:54,589 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.050359712230216) internal successors, (285), 138 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 691 [2022-01-31 19:18:54,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:18:54,604 INFO L225 Difference]: With dead ends: 1123 [2022-01-31 19:18:54,604 INFO L226 Difference]: Without dead ends: 704 [2022-01-31 19:18:54,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 19:18:54,607 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2486 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2487 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:18:54,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2487 Valid, 58 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:18:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-01-31 19:18:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 701. [2022-01-31 19:18:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 695 states have (on average 1.2014388489208634) internal successors, (835), 695 states have internal predecessors, (835), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:18:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 840 transitions. [2022-01-31 19:18:55,000 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 840 transitions. Word has length 691 [2022-01-31 19:18:55,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:18:55,000 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 840 transitions. [2022-01-31 19:18:55,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.050359712230216) internal successors, (285), 138 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:55,000 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 840 transitions. [2022-01-31 19:18:55,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 697 [2022-01-31 19:18:55,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:18:55,002 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:18:55,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 19:18:55,002 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:18:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:18:55,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1140687252, now seen corresponding path program 136 times [2022-01-31 19:18:55,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:18:55,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057729620] [2022-01-31 19:18:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:18:55,004 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:18:55,004 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:18:55,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:18:55,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:18:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:59,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:18:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:59,621 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 19:18:59,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:18:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057729620] [2022-01-31 19:18:59,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2057729620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:18:59,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:18:59,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 19:18:59,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419231584] [2022-01-31 19:18:59,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:18:59,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 19:18:59,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:18:59,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 19:18:59,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 19:18:59,624 INFO L87 Difference]: Start difference. First operand 701 states and 840 transitions. Second operand has 140 states, 140 states have (on average 2.05) internal successors, (287), 139 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:19:08,263 INFO L93 Difference]: Finished difference Result 1131 states and 1412 transitions. [2022-01-31 19:19:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 19:19:08,263 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.05) internal successors, (287), 139 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 696 [2022-01-31 19:19:08,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:19:08,264 INFO L225 Difference]: With dead ends: 1131 [2022-01-31 19:19:08,264 INFO L226 Difference]: Without dead ends: 709 [2022-01-31 19:19:08,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 19:19:08,267 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2638 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2639 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:19:08,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2639 Valid, 43 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:19:08,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-31 19:19:08,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 706. [2022-01-31 19:19:08,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 700 states have (on average 1.2014285714285715) internal successors, (841), 700 states have internal predecessors, (841), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:19:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 846 transitions. [2022-01-31 19:19:08,602 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 846 transitions. Word has length 696 [2022-01-31 19:19:08,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:19:08,603 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 846 transitions. [2022-01-31 19:19:08,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.05) internal successors, (287), 139 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 846 transitions. [2022-01-31 19:19:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2022-01-31 19:19:08,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:19:08,605 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 137, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:19:08,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 19:19:08,605 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:19:08,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:19:08,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1223984359, now seen corresponding path program 137 times [2022-01-31 19:19:08,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:19:08,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130255773] [2022-01-31 19:19:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:19:08,607 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:19:08,607 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:19:08,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:19:08,673 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:19:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:13,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:19:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:13,266 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 19:19:13,266 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:19:13,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130255773] [2022-01-31 19:19:13,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2130255773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:19:13,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:19:13,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 19:19:13,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932454648] [2022-01-31 19:19:13,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:19:13,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 19:19:13,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:19:13,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 19:19:13,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 19:19:13,269 INFO L87 Difference]: Start difference. First operand 706 states and 846 transitions. Second operand has 141 states, 141 states have (on average 2.049645390070922) internal successors, (289), 140 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:19:21,465 INFO L93 Difference]: Finished difference Result 1139 states and 1422 transitions. [2022-01-31 19:19:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 19:19:21,466 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.049645390070922) internal successors, (289), 140 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 701 [2022-01-31 19:19:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:19:21,467 INFO L225 Difference]: With dead ends: 1139 [2022-01-31 19:19:21,467 INFO L226 Difference]: Without dead ends: 714 [2022-01-31 19:19:21,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9590 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 19:19:21,469 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2646 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2647 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:19:21,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2647 Valid, 43 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:19:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-31 19:19:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 711. [2022-01-31 19:19:21,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 705 states have (on average 1.2014184397163121) internal successors, (847), 705 states have internal predecessors, (847), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:19:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 852 transitions. [2022-01-31 19:19:21,815 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 852 transitions. Word has length 701 [2022-01-31 19:19:21,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:19:21,816 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 852 transitions. [2022-01-31 19:19:21,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.049645390070922) internal successors, (289), 140 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:21,816 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 852 transitions. [2022-01-31 19:19:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2022-01-31 19:19:21,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:19:21,818 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 138, 138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:19:21,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 19:19:21,818 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:19:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:19:21,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1245460728, now seen corresponding path program 138 times [2022-01-31 19:19:21,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:19:21,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360172659] [2022-01-31 19:19:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:19:21,820 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:19:21,820 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:19:21,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:19:21,870 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:19:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:26,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:19:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:19:26,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:19:26,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360172659] [2022-01-31 19:19:26,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1360172659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:19:26,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:19:26,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 19:19:26,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866642528] [2022-01-31 19:19:26,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:19:26,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 19:19:26,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:19:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 19:19:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 19:19:26,778 INFO L87 Difference]: Start difference. First operand 711 states and 852 transitions. Second operand has 142 states, 142 states have (on average 2.0492957746478875) internal successors, (291), 141 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:35,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:19:35,224 INFO L93 Difference]: Finished difference Result 1147 states and 1432 transitions. [2022-01-31 19:19:35,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 19:19:35,224 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.0492957746478875) internal successors, (291), 141 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 706 [2022-01-31 19:19:35,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:19:35,225 INFO L225 Difference]: With dead ends: 1147 [2022-01-31 19:19:35,225 INFO L226 Difference]: Without dead ends: 719 [2022-01-31 19:19:35,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=29610, Invalid=49070, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 19:19:35,228 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2393 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2394 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:19:35,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2394 Valid, 73 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [846 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:19:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-31 19:19:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 716. [2022-01-31 19:19:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 710 states have (on average 1.2014084507042253) internal successors, (853), 710 states have internal predecessors, (853), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:19:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 858 transitions. [2022-01-31 19:19:35,622 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 858 transitions. Word has length 706 [2022-01-31 19:19:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:19:35,622 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 858 transitions. [2022-01-31 19:19:35,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.0492957746478875) internal successors, (291), 141 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 858 transitions. [2022-01-31 19:19:35,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2022-01-31 19:19:35,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:19:35,625 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 139, 139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:19:35,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 19:19:35,625 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:19:35,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:19:35,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1024404405, now seen corresponding path program 139 times [2022-01-31 19:19:35,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:19:35,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125240932] [2022-01-31 19:19:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:19:35,626 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:19:35,627 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:19:35,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:19:35,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:19:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:41,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:19:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:19:41,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:19:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125240932] [2022-01-31 19:19:41,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1125240932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:19:41,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:19:41,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 19:19:41,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315429896] [2022-01-31 19:19:41,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:19:41,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 19:19:41,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:19:41,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 19:19:41,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 19:19:41,091 INFO L87 Difference]: Start difference. First operand 716 states and 858 transitions. Second operand has 143 states, 143 states have (on average 2.0489510489510487) internal successors, (293), 142 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:49,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:19:49,425 INFO L93 Difference]: Finished difference Result 1155 states and 1442 transitions. [2022-01-31 19:19:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 19:19:49,425 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.0489510489510487) internal successors, (293), 142 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 711 [2022-01-31 19:19:49,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:19:49,426 INFO L225 Difference]: With dead ends: 1155 [2022-01-31 19:19:49,426 INFO L226 Difference]: Without dead ends: 724 [2022-01-31 19:19:49,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9869 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=30033, Invalid=49773, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 19:19:49,429 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2617 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2618 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:19:49,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2618 Valid, 58 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:19:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-31 19:19:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 721. [2022-01-31 19:19:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 715 states have (on average 1.2013986013986013) internal successors, (859), 715 states have internal predecessors, (859), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:19:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 864 transitions. [2022-01-31 19:19:49,795 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 864 transitions. Word has length 711 [2022-01-31 19:19:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:19:49,795 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 864 transitions. [2022-01-31 19:19:49,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.0489510489510487) internal successors, (293), 142 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 864 transitions. [2022-01-31 19:19:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2022-01-31 19:19:49,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:19:49,798 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 140, 140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:19:49,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 19:19:49,798 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:19:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:19:49,798 INFO L85 PathProgramCache]: Analyzing trace with hash 374124636, now seen corresponding path program 140 times [2022-01-31 19:19:49,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:19:49,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169468418] [2022-01-31 19:19:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:19:49,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:19:49,800 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:19:49,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:19:49,845 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:19:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:55,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:19:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:19:55,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:19:55,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169468418] [2022-01-31 19:19:55,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1169468418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:19:55,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:19:55,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 19:19:55,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532716160] [2022-01-31 19:19:55,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:19:55,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 19:19:55,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:19:55,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 19:19:55,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 19:19:55,505 INFO L87 Difference]: Start difference. First operand 721 states and 864 transitions. Second operand has 144 states, 144 states have (on average 2.048611111111111) internal successors, (295), 143 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:04,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:20:04,195 INFO L93 Difference]: Finished difference Result 1163 states and 1452 transitions. [2022-01-31 19:20:04,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 19:20:04,195 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.048611111111111) internal successors, (295), 143 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 716 [2022-01-31 19:20:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:20:04,196 INFO L225 Difference]: With dead ends: 1163 [2022-01-31 19:20:04,196 INFO L226 Difference]: Without dead ends: 729 [2022-01-31 19:20:04,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=30459, Invalid=50481, Unknown=0, NotChecked=0, Total=80940 [2022-01-31 19:20:04,199 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2826 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2827 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:20:04,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2827 Valid, 43 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [990 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:20:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-01-31 19:20:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 726. [2022-01-31 19:20:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 720 states have (on average 1.2013888888888888) internal successors, (865), 720 states have internal predecessors, (865), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:20:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 870 transitions. [2022-01-31 19:20:04,587 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 870 transitions. Word has length 716 [2022-01-31 19:20:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:20:04,587 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 870 transitions. [2022-01-31 19:20:04,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.048611111111111) internal successors, (295), 143 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 870 transitions. [2022-01-31 19:20:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2022-01-31 19:20:04,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:20:04,589 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 141, 141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:20:04,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 19:20:04,589 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:20:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:20:04,590 INFO L85 PathProgramCache]: Analyzing trace with hash 763624529, now seen corresponding path program 141 times [2022-01-31 19:20:04,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:20:04,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3183865] [2022-01-31 19:20:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:20:04,591 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:20:04,591 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:20:04,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:20:04,637 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:20:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:11,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:20:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:20:11,144 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:20:11,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3183865] [2022-01-31 19:20:11,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [3183865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:20:11,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:20:11,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 19:20:11,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296012060] [2022-01-31 19:20:11,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:20:11,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 19:20:11,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:20:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 19:20:11,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 19:20:11,147 INFO L87 Difference]: Start difference. First operand 726 states and 870 transitions. Second operand has 145 states, 145 states have (on average 2.0482758620689654) internal successors, (297), 144 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:20:20,332 INFO L93 Difference]: Finished difference Result 1171 states and 1462 transitions. [2022-01-31 19:20:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 19:20:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0482758620689654) internal successors, (297), 144 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 721 [2022-01-31 19:20:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:20:20,333 INFO L225 Difference]: With dead ends: 1171 [2022-01-31 19:20:20,333 INFO L226 Difference]: Without dead ends: 734 [2022-01-31 19:20:20,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10152 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=30888, Invalid=51194, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 19:20:20,336 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3215 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 1127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3216 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:20:20,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3216 Valid, 53 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1127 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:20:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-01-31 19:20:20,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 731. [2022-01-31 19:20:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 725 states have (on average 1.2013793103448276) internal successors, (871), 725 states have internal predecessors, (871), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:20:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 876 transitions. [2022-01-31 19:20:20,723 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 876 transitions. Word has length 721 [2022-01-31 19:20:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:20:20,723 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 876 transitions. [2022-01-31 19:20:20,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0482758620689654) internal successors, (297), 144 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 876 transitions. [2022-01-31 19:20:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-01-31 19:20:20,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:20:20,726 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 142, 142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:20:20,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 19:20:20,726 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:20:20,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:20:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash -66508864, now seen corresponding path program 142 times [2022-01-31 19:20:20,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:20:20,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204419133] [2022-01-31 19:20:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:20:20,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:20:20,728 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:20:20,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:20:20,778 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:20:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:26,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:20:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:20:26,710 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:20:26,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204419133] [2022-01-31 19:20:26,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [204419133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:20:26,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:20:26,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 19:20:26,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489501178] [2022-01-31 19:20:26,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:20:26,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 19:20:26,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:20:26,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 19:20:26,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 19:20:26,714 INFO L87 Difference]: Start difference. First operand 731 states and 876 transitions. Second operand has 146 states, 146 states have (on average 2.047945205479452) internal successors, (299), 145 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:20:36,498 INFO L93 Difference]: Finished difference Result 1179 states and 1472 transitions. [2022-01-31 19:20:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 19:20:36,498 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.047945205479452) internal successors, (299), 145 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 726 [2022-01-31 19:20:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:20:36,499 INFO L225 Difference]: With dead ends: 1179 [2022-01-31 19:20:36,499 INFO L226 Difference]: Without dead ends: 739 [2022-01-31 19:20:36,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10295 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=31320, Invalid=51912, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 19:20:36,502 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2617 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 919 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2618 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 919 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:20:36,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2618 Valid, 43 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [919 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:20:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-31 19:20:36,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 736. [2022-01-31 19:20:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 730 states have (on average 1.2013698630136986) internal successors, (877), 730 states have internal predecessors, (877), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:20:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 882 transitions. [2022-01-31 19:20:36,872 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 882 transitions. Word has length 726 [2022-01-31 19:20:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:20:36,872 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 882 transitions. [2022-01-31 19:20:36,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.047945205479452) internal successors, (299), 145 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 882 transitions. [2022-01-31 19:20:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2022-01-31 19:20:36,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:20:36,874 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 143, 143, 143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:20:36,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 19:20:36,874 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:20:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:20:36,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1353732883, now seen corresponding path program 143 times [2022-01-31 19:20:36,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:20:36,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537150982] [2022-01-31 19:20:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:20:36,876 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:20:36,876 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:20:36,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:20:36,965 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:20:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:41,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:20:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:20:41,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:20:41,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537150982] [2022-01-31 19:20:41,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1537150982] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:20:41,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:20:41,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 19:20:41,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444028905] [2022-01-31 19:20:41,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:20:41,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 19:20:41,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:20:41,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 19:20:41,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 19:20:41,775 INFO L87 Difference]: Start difference. First operand 736 states and 882 transitions. Second operand has 147 states, 147 states have (on average 2.0476190476190474) internal successors, (301), 146 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:20:51,169 INFO L93 Difference]: Finished difference Result 1187 states and 1482 transitions. [2022-01-31 19:20:51,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 19:20:51,169 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.0476190476190474) internal successors, (301), 146 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 731 [2022-01-31 19:20:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:20:51,170 INFO L225 Difference]: With dead ends: 1187 [2022-01-31 19:20:51,170 INFO L226 Difference]: Without dead ends: 744 [2022-01-31 19:20:51,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10439 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=31755, Invalid=52635, Unknown=0, NotChecked=0, Total=84390 [2022-01-31 19:20:51,173 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2313 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 819 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 819 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:20:51,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2314 Valid, 73 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [819 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:20:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-01-31 19:20:51,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 741. [2022-01-31 19:20:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 735 states have (on average 1.2013605442176871) internal successors, (883), 735 states have internal predecessors, (883), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:20:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 888 transitions. [2022-01-31 19:20:51,573 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 888 transitions. Word has length 731 [2022-01-31 19:20:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:20:51,573 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 888 transitions. [2022-01-31 19:20:51,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 2.0476190476190474) internal successors, (301), 146 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 888 transitions. [2022-01-31 19:20:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2022-01-31 19:20:51,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:20:51,575 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 144, 144, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:20:51,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 19:20:51,575 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:20:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:20:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1832132828, now seen corresponding path program 144 times [2022-01-31 19:20:51,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:20:51,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643665894] [2022-01-31 19:20:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:20:51,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:20:51,577 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:20:51,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:20:51,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:20:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:57,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:20:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:20:57,759 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:20:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643665894] [2022-01-31 19:20:57,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1643665894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:20:57,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:20:57,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 19:20:57,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695391954] [2022-01-31 19:20:57,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:20:57,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 19:20:57,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:20:57,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 19:20:57,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 19:20:57,762 INFO L87 Difference]: Start difference. First operand 741 states and 888 transitions. Second operand has 148 states, 148 states have (on average 2.0472972972972974) internal successors, (303), 147 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:21:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:21:06,878 INFO L93 Difference]: Finished difference Result 1195 states and 1492 transitions. [2022-01-31 19:21:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-31 19:21:06,878 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.0472972972972974) internal successors, (303), 147 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 736 [2022-01-31 19:21:06,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:21:06,879 INFO L225 Difference]: With dead ends: 1195 [2022-01-31 19:21:06,879 INFO L226 Difference]: Without dead ends: 749 [2022-01-31 19:21:06,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10584 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=32193, Invalid=53363, Unknown=0, NotChecked=0, Total=85556 [2022-01-31 19:21:06,882 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2474 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2475 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:21:06,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2475 Valid, 58 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:21:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-31 19:21:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 746. [2022-01-31 19:21:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 740 states have (on average 1.2013513513513514) internal successors, (889), 740 states have internal predecessors, (889), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:21:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 894 transitions. [2022-01-31 19:21:07,289 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 894 transitions. Word has length 736 [2022-01-31 19:21:07,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:21:07,290 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 894 transitions. [2022-01-31 19:21:07,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.0472972972972974) internal successors, (303), 147 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:21:07,290 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 894 transitions. [2022-01-31 19:21:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2022-01-31 19:21:07,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:21:07,292 INFO L514 BasicCegarLoop]: trace histogram [145, 145, 145, 145, 145, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:21:07,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 19:21:07,292 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:21:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:21:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash 869793161, now seen corresponding path program 145 times [2022-01-31 19:21:07,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:21:07,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676524811] [2022-01-31 19:21:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:21:07,294 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:21:07,294 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:21:07,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:21:07,342 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:21:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:21:12,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:21:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:21:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:21:12,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:21:12,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676524811] [2022-01-31 19:21:12,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [676524811] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:21:12,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:21:12,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-01-31 19:21:12,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829980713] [2022-01-31 19:21:12,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:21:12,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-01-31 19:21:12,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:21:12,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-01-31 19:21:12,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 19:21:12,149 INFO L87 Difference]: Start difference. First operand 746 states and 894 transitions. Second operand has 149 states, 149 states have (on average 2.046979865771812) internal successors, (305), 148 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:21:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:21:22,370 INFO L93 Difference]: Finished difference Result 1203 states and 1502 transitions. [2022-01-31 19:21:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 19:21:22,370 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.046979865771812) internal successors, (305), 148 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 741 [2022-01-31 19:21:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:21:22,371 INFO L225 Difference]: With dead ends: 1203 [2022-01-31 19:21:22,371 INFO L226 Difference]: Without dead ends: 754 [2022-01-31 19:21:22,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10730 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=32634, Invalid=54096, Unknown=0, NotChecked=0, Total=86730 [2022-01-31 19:21:22,374 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2521 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2522 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 890 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:21:22,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2522 Valid, 58 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [890 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:21:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-31 19:21:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 751. [2022-01-31 19:21:22,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 745 states have (on average 1.2013422818791946) internal successors, (895), 745 states have internal predecessors, (895), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:21:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 900 transitions. [2022-01-31 19:21:22,782 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 900 transitions. Word has length 741 [2022-01-31 19:21:22,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:21:22,782 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 900 transitions. [2022-01-31 19:21:22,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.046979865771812) internal successors, (305), 148 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:21:22,782 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 900 transitions. [2022-01-31 19:21:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 747 [2022-01-31 19:21:22,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:21:22,785 INFO L514 BasicCegarLoop]: trace histogram [146, 146, 146, 146, 146, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:21:22,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 19:21:22,785 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:21:22,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:21:22,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1720772984, now seen corresponding path program 146 times [2022-01-31 19:21:22,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:21:22,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612847752] [2022-01-31 19:21:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:21:22,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:21:22,787 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:21:22,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:21:22,836 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:21:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:21:28,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:21:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:21:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:21:28,109 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:21:28,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612847752] [2022-01-31 19:21:28,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [612847752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:21:28,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:21:28,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 19:21:28,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053895845] [2022-01-31 19:21:28,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:21:28,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 19:21:28,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:21:28,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 19:21:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 19:21:28,113 INFO L87 Difference]: Start difference. First operand 751 states and 900 transitions. Second operand has 150 states, 150 states have (on average 2.046666666666667) internal successors, (307), 149 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:21:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:21:38,690 INFO L93 Difference]: Finished difference Result 1211 states and 1512 transitions. [2022-01-31 19:21:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 19:21:38,691 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.046666666666667) internal successors, (307), 149 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 746 [2022-01-31 19:21:38,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:21:38,691 INFO L225 Difference]: With dead ends: 1211 [2022-01-31 19:21:38,691 INFO L226 Difference]: Without dead ends: 759 [2022-01-31 19:21:38,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10877 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=33078, Invalid=54834, Unknown=0, NotChecked=0, Total=87912 [2022-01-31 19:21:38,694 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3060 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1068 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3061 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1068 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:21:38,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3061 Valid, 53 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1068 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:21:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-01-31 19:21:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 756. [2022-01-31 19:21:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 750 states have (on average 1.2013333333333334) internal successors, (901), 750 states have internal predecessors, (901), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:21:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 906 transitions. [2022-01-31 19:21:39,079 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 906 transitions. Word has length 746 [2022-01-31 19:21:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:21:39,079 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 906 transitions. [2022-01-31 19:21:39,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.046666666666667) internal successors, (307), 149 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:21:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 906 transitions. [2022-01-31 19:21:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2022-01-31 19:21:39,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:21:39,082 INFO L514 BasicCegarLoop]: trace histogram [147, 147, 147, 147, 147, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:21:39,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 19:21:39,082 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:21:39,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:21:39,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1828540891, now seen corresponding path program 147 times [2022-01-31 19:21:39,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:21:39,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957247997] [2022-01-31 19:21:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:21:39,084 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:21:39,084 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:21:39,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:21:39,132 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:21:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:21:44,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:21:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:21:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:21:44,868 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:21:44,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957247997] [2022-01-31 19:21:44,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [957247997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:21:44,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:21:44,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-01-31 19:21:44,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26173354] [2022-01-31 19:21:44,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:21:44,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-31 19:21:44,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:21:44,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-31 19:21:44,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 19:21:44,871 INFO L87 Difference]: Start difference. First operand 756 states and 906 transitions. Second operand has 151 states, 151 states have (on average 2.0463576158940397) internal successors, (309), 150 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:21:55,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:21:55,888 INFO L93 Difference]: Finished difference Result 1219 states and 1522 transitions. [2022-01-31 19:21:55,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 19:21:55,889 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.0463576158940397) internal successors, (309), 150 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 751 [2022-01-31 19:21:55,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:21:55,889 INFO L225 Difference]: With dead ends: 1219 [2022-01-31 19:21:55,889 INFO L226 Difference]: Without dead ends: 764 [2022-01-31 19:21:55,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11025 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=33525, Invalid=55577, Unknown=0, NotChecked=0, Total=89102 [2022-01-31 19:21:55,892 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 1132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3237 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1132 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:21:55,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3237 Valid, 38 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1132 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:21:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-31 19:21:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 761. [2022-01-31 19:21:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 755 states have (on average 1.2013245033112583) internal successors, (907), 755 states have internal predecessors, (907), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:21:56,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 912 transitions. [2022-01-31 19:21:56,311 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 912 transitions. Word has length 751 [2022-01-31 19:21:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:21:56,311 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 912 transitions. [2022-01-31 19:21:56,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.0463576158940397) internal successors, (309), 150 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:21:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 912 transitions. [2022-01-31 19:21:56,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2022-01-31 19:21:56,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:21:56,313 INFO L514 BasicCegarLoop]: trace histogram [148, 148, 148, 148, 148, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:21:56,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 19:21:56,314 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:21:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:21:56,318 INFO L85 PathProgramCache]: Analyzing trace with hash -632484372, now seen corresponding path program 148 times [2022-01-31 19:21:56,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:21:56,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743559578] [2022-01-31 19:21:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:21:56,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:21:56,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:21:56,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:21:56,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:21:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:22:01,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:22:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:22:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:22:01,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:22:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743559578] [2022-01-31 19:22:01,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [743559578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:22:01,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:22:01,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-01-31 19:22:01,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534318926] [2022-01-31 19:22:01,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:22:01,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 19:22:01,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:22:01,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 19:22:01,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 19:22:01,259 INFO L87 Difference]: Start difference. First operand 761 states and 912 transitions. Second operand has 152 states, 152 states have (on average 2.0460526315789473) internal successors, (311), 151 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:22:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:22:11,047 INFO L93 Difference]: Finished difference Result 1227 states and 1532 transitions. [2022-01-31 19:22:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 19:22:11,047 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0460526315789473) internal successors, (311), 151 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 756 [2022-01-31 19:22:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:22:11,048 INFO L225 Difference]: With dead ends: 1227 [2022-01-31 19:22:11,048 INFO L226 Difference]: Without dead ends: 769 [2022-01-31 19:22:11,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11174 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=33975, Invalid=56325, Unknown=0, NotChecked=0, Total=90300 [2022-01-31 19:22:11,052 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2863 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 1005 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2864 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1005 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:22:11,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2864 Valid, 53 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1005 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:22:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-31 19:22:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 766. [2022-01-31 19:22:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 760 states have (on average 1.2013157894736841) internal successors, (913), 760 states have internal predecessors, (913), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:22:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 918 transitions. [2022-01-31 19:22:11,440 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 918 transitions. Word has length 756 [2022-01-31 19:22:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:22:11,441 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 918 transitions. [2022-01-31 19:22:11,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0460526315789473) internal successors, (311), 151 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:22:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 918 transitions. [2022-01-31 19:22:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2022-01-31 19:22:11,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:22:11,443 INFO L514 BasicCegarLoop]: trace histogram [149, 149, 149, 149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:22:11,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 19:22:11,443 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:22:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:22:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash 657817281, now seen corresponding path program 149 times [2022-01-31 19:22:11,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:22:11,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256625416] [2022-01-31 19:22:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:22:11,445 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:22:11,445 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:22:11,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:22:11,495 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:22:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat