/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:44:35,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:44:35,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:44:35,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:44:35,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:44:35,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:44:35,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:44:35,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:44:35,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:44:35,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:44:35,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:44:35,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:44:35,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:44:35,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:44:35,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:44:35,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:44:35,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:44:35,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:44:35,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:44:35,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:44:35,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:44:35,693 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:44:35,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:44:35,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:44:35,694 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:44:35,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:44:35,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:44:35,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:44:35,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:44:35,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:44:35,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:44:35,695 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:44:35,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:44:35,695 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:44:35,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:44:35,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:44:35,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:44:35,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:44:35,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:44:35,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:44:35,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:44:35,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:44:35,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:44:35,696 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:44:35,696 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:44:35,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:44:35,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:44:35,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:44:35,899 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:44:35,900 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:44:35,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2022-01-31 17:44:35,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/159a3ec7b/375777ae32bd4f4794fde8493f6cd399/FLAG74a1c3514 [2022-01-31 17:44:36,295 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:44:36,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2022-01-31 17:44:36,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/159a3ec7b/375777ae32bd4f4794fde8493f6cd399/FLAG74a1c3514 [2022-01-31 17:44:36,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/159a3ec7b/375777ae32bd4f4794fde8493f6cd399 [2022-01-31 17:44:36,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:44:36,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:44:36,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:44:36,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:44:36,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:44:36,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:44:36" (1/1) ... [2022-01-31 17:44:36,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f11d87f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:36, skipping insertion in model container [2022-01-31 17:44:36,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:44:36" (1/1) ... [2022-01-31 17:44:36,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:44:36,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:44:36,476 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-2.i[816,829] [2022-01-31 17:44:36,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:44:36,512 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:44:36,521 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-2.i[816,829] [2022-01-31 17:44:36,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:44:36,548 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:44:36,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:36 WrapperNode [2022-01-31 17:44:36,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:44:36,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:44:36,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:44:36,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:44:36,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:36" (1/1) ... [2022-01-31 17:44:36,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:36" (1/1) ... [2022-01-31 17:44:36,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:36" (1/1) ... [2022-01-31 17:44:36,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:36" (1/1) ... [2022-01-31 17:44:36,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:36" (1/1) ... [2022-01-31 17:44:36,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:36" (1/1) ... [2022-01-31 17:44:36,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:36" (1/1) ... [2022-01-31 17:44:36,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:44:36,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:44:36,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:44:36,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:44:36,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:36" (1/1) ... [2022-01-31 17:44:36,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:44:36,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:44:36,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 17:44:36,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 17:44:36,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:44:36,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:44:36,661 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:44:36,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:44:36,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:44:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:44:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:44:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:44:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:44:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:44:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:44:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:44:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:44:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:44:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:44:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:44:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:44:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:44:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:44:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:44:36,738 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:44:36,739 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:44:36,931 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:44:36,934 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:44:36,934 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-01-31 17:44:36,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:44:36 BoogieIcfgContainer [2022-01-31 17:44:36,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:44:36,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:44:36,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:44:36,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:44:36,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:44:36" (1/3) ... [2022-01-31 17:44:36,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c61e55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:44:36, skipping insertion in model container [2022-01-31 17:44:36,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:36" (2/3) ... [2022-01-31 17:44:36,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c61e55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:44:36, skipping insertion in model container [2022-01-31 17:44:36,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:44:36" (3/3) ... [2022-01-31 17:44:36,949 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-2.i [2022-01-31 17:44:36,952 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:44:36,953 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:44:36,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:44:36,993 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:44:36,993 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:44:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 30 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:44:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:44:37,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:37,009 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, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:37,010 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:37,014 INFO L85 PathProgramCache]: Analyzing trace with hash 605594039, now seen corresponding path program 1 times [2022-01-31 17:44:37,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:37,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624563988] [2022-01-31 17:44:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:37,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:37,059 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:37,163 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:37,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624563988] [2022-01-31 17:44:37,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [624563988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:37,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:37,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:44:37,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862455878] [2022-01-31 17:44:37,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:37,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:44:37,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:37,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:44:37,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:44:37,187 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 30 states have internal predecessors, (49), 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 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:37,236 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2022-01-31 17:44:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:44:37,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 17:44:37,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:37,245 INFO L225 Difference]: With dead ends: 67 [2022-01-31 17:44:37,245 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 17:44:37,247 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 17:44:37,250 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:37,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:44:37,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 17:44:37,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 17:44:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-01-31 17:44:37,278 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 27 [2022-01-31 17:44:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:37,278 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-01-31 17:44:37,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-01-31 17:44:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:44:37,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:37,279 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, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:37,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:44:37,280 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:37,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1292911787, now seen corresponding path program 1 times [2022-01-31 17:44:37,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:37,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821521874] [2022-01-31 17:44:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:37,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:37,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:37,351 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:37,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821521874] [2022-01-31 17:44:37,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [821521874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:37,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:37,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:44:37,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582203915] [2022-01-31 17:44:37,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:37,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:44:37,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:44:37,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:44:37,353 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:37,445 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2022-01-31 17:44:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:44:37,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 17:44:37,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:37,446 INFO L225 Difference]: With dead ends: 65 [2022-01-31 17:44:37,447 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 17:44:37,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:44:37,448 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:37,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 38 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 17:44:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 17:44:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 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 17:44:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-01-31 17:44:37,454 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2022-01-31 17:44:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:37,455 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-01-31 17:44:37,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-01-31 17:44:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:44:37,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:37,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:37,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:44:37,459 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:37,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:37,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1348929241, now seen corresponding path program 1 times [2022-01-31 17:44:37,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:37,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314520114] [2022-01-31 17:44:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:37,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:37,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:37,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:37,484 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:37,537 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:37,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314520114] [2022-01-31 17:44:37,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [314520114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:37,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:37,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:44:37,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202881507] [2022-01-31 17:44:37,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:37,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:44:37,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:44:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:44:37,539 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:37,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:37,678 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2022-01-31 17:44:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:44:37,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 17:44:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:37,681 INFO L225 Difference]: With dead ends: 80 [2022-01-31 17:44:37,681 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 17:44:37,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:44:37,687 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:37,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 17:44:37,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-31 17:44:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-01-31 17:44:37,702 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 35 [2022-01-31 17:44:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:37,703 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-01-31 17:44:37,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:37,703 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-01-31 17:44:37,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:44:37,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:37,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:37,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:44:37,706 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:37,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash -46684373, now seen corresponding path program 2 times [2022-01-31 17:44:37,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:37,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881140866] [2022-01-31 17:44:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:37,710 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:37,710 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:37,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:37,712 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:37,826 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881140866] [2022-01-31 17:44:37,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1881140866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:37,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:37,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:44:37,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076450782] [2022-01-31 17:44:37,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:37,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:44:37,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:37,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:44:37,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:44:37,829 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:37,960 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2022-01-31 17:44:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:44:37,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 17:44:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:37,961 INFO L225 Difference]: With dead ends: 95 [2022-01-31 17:44:37,961 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 17:44:37,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:44:37,962 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:37,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 17:44:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 17:44:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-01-31 17:44:37,968 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 43 [2022-01-31 17:44:37,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:37,968 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-01-31 17:44:37,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:37,969 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-01-31 17:44:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:44:37,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:37,970 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:37,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:44:37,970 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:37,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:37,970 INFO L85 PathProgramCache]: Analyzing trace with hash -663220313, now seen corresponding path program 3 times [2022-01-31 17:44:37,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:37,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994161343] [2022-01-31 17:44:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:37,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:37,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:37,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:37,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:38,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:38,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994161343] [2022-01-31 17:44:38,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994161343] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:38,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:38,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:44:38,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578789321] [2022-01-31 17:44:38,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:38,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:44:38,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:44:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:44:38,038 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:38,149 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2022-01-31 17:44:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:44:38,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 51 [2022-01-31 17:44:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:38,150 INFO L225 Difference]: With dead ends: 110 [2022-01-31 17:44:38,150 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 17:44:38,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:44:38,151 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:38,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 17:44:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 17:44:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 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 17:44:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-01-31 17:44:38,157 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 51 [2022-01-31 17:44:38,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:38,157 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-01-31 17:44:38,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-01-31 17:44:38,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:44:38,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:38,158 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:38,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:44:38,158 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:38,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:38,159 INFO L85 PathProgramCache]: Analyzing trace with hash -414881365, now seen corresponding path program 4 times [2022-01-31 17:44:38,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:38,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630532606] [2022-01-31 17:44:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:38,160 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:38,160 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:38,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:38,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:38,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:38,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630532606] [2022-01-31 17:44:38,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1630532606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:38,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:38,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:44:38,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664808505] [2022-01-31 17:44:38,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:38,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:44:38,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:38,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:44:38,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:44:38,231 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:38,362 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2022-01-31 17:44:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:44:38,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 17:44:38,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:38,363 INFO L225 Difference]: With dead ends: 125 [2022-01-31 17:44:38,363 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 17:44:38,363 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 17:44:38,364 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:38,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 17:44:38,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-01-31 17:44:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 66 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-01-31 17:44:38,370 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 59 [2022-01-31 17:44:38,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:38,370 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-01-31 17:44:38,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-01-31 17:44:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:44:38,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:38,371 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:38,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:44:38,371 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:38,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1048295897, now seen corresponding path program 5 times [2022-01-31 17:44:38,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:38,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111022890] [2022-01-31 17:44:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:38,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:38,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:38,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:38,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:38,474 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:38,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111022890] [2022-01-31 17:44:38,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [111022890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:38,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:38,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:44:38,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204705713] [2022-01-31 17:44:38,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:38,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:44:38,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:44:38,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:44:38,476 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:38,648 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2022-01-31 17:44:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:44:38,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 17:44:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:38,651 INFO L225 Difference]: With dead ends: 140 [2022-01-31 17:44:38,651 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 17:44:38,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:44:38,654 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:38,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 17:44:38,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-01-31 17:44:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 74 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-01-31 17:44:38,673 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 67 [2022-01-31 17:44:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:38,674 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-01-31 17:44:38,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-01-31 17:44:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:44:38,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:38,674 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:38,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:44:38,675 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:38,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash 639208491, now seen corresponding path program 6 times [2022-01-31 17:44:38,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:38,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433816605] [2022-01-31 17:44:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:38,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:38,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:38,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:38,677 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,778 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 17:44:38,778 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:38,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433816605] [2022-01-31 17:44:38,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1433816605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:38,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:38,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:44:38,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814260971] [2022-01-31 17:44:38,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:38,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:44:38,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:44:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:44:38,779 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:38,959 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2022-01-31 17:44:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:44:38,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 17:44:38,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:38,960 INFO L225 Difference]: With dead ends: 155 [2022-01-31 17:44:38,960 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 17:44:38,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:44:38,961 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:38,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 17:44:38,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-01-31 17:44:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 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 17:44:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-01-31 17:44:38,980 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 75 [2022-01-31 17:44:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:38,980 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-01-31 17:44:38,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-01-31 17:44:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:44:38,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:38,981 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:38,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:44:38,981 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:38,981 INFO L85 PathProgramCache]: Analyzing trace with hash 710778023, now seen corresponding path program 7 times [2022-01-31 17:44:38,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:38,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708879930] [2022-01-31 17:44:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:38,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:38,982 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:38,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:38,983 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:39,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:39,105 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708879930] [2022-01-31 17:44:39,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1708879930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:39,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:39,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:44:39,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042970879] [2022-01-31 17:44:39,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:39,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:44:39,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:44:39,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:44:39,107 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:39,342 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2022-01-31 17:44:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:44:39,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 83 [2022-01-31 17:44:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:39,343 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:44:39,343 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 17:44:39,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:44:39,344 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:39,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:39,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 17:44:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-01-31 17:44:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.1) internal successors, (99), 90 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-01-31 17:44:39,362 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 83 [2022-01-31 17:44:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:39,363 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-01-31 17:44:39,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-01-31 17:44:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:44:39,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:39,364 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:39,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:44:39,364 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash -694939989, now seen corresponding path program 8 times [2022-01-31 17:44:39,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:39,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248384620] [2022-01-31 17:44:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:39,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:39,365 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:39,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:39,367 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:39,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:39,464 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:39,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248384620] [2022-01-31 17:44:39,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [248384620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:39,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:39,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:44:39,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878122209] [2022-01-31 17:44:39,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:39,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:44:39,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:39,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:44:39,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:44:39,465 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:39,711 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2022-01-31 17:44:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:44:39,712 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 17:44:39,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:39,712 INFO L225 Difference]: With dead ends: 185 [2022-01-31 17:44:39,712 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 17:44:39,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:44:39,713 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:39,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 17:44:39,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-31 17:44:39,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.0918367346938775) internal successors, (107), 98 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2022-01-31 17:44:39,719 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 91 [2022-01-31 17:44:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:39,719 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2022-01-31 17:44:39,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2022-01-31 17:44:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:44:39,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:39,720 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:39,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:44:39,722 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:39,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash -257682649, now seen corresponding path program 9 times [2022-01-31 17:44:39,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:39,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317337494] [2022-01-31 17:44:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:39,724 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:39,724 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:39,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:39,725 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:39,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:39,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:39,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317337494] [2022-01-31 17:44:39,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1317337494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:39,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:39,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:44:39,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082633855] [2022-01-31 17:44:39,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:39,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:44:39,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:39,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:44:39,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:44:39,837 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:40,071 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2022-01-31 17:44:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:44:40,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 99 [2022-01-31 17:44:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:40,072 INFO L225 Difference]: With dead ends: 200 [2022-01-31 17:44:40,072 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 17:44:40,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:44:40,073 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:40,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 17:44:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-01-31 17:44:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 106 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 17:44:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-01-31 17:44:40,077 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 99 [2022-01-31 17:44:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:40,078 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-01-31 17:44:40,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-01-31 17:44:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:44:40,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:40,079 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:40,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:44:40,079 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:40,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:40,079 INFO L85 PathProgramCache]: Analyzing trace with hash 395637035, now seen corresponding path program 10 times [2022-01-31 17:44:40,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:40,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263511612] [2022-01-31 17:44:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:40,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:40,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:40,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:40,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:40,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:40,227 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:40,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263511612] [2022-01-31 17:44:40,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263511612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:40,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:40,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:44:40,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999583542] [2022-01-31 17:44:40,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:40,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:44:40,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:40,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:44:40,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:44:40,228 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:40,460 INFO L93 Difference]: Finished difference Result 215 states and 238 transitions. [2022-01-31 17:44:40,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:44:40,460 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 17:44:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:40,461 INFO L225 Difference]: With dead ends: 215 [2022-01-31 17:44:40,461 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 17:44:40,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:44:40,462 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:40,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 17:44:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-01-31 17:44:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.0789473684210527) internal successors, (123), 114 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2022-01-31 17:44:40,467 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 107 [2022-01-31 17:44:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:40,467 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2022-01-31 17:44:40,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2022-01-31 17:44:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:44:40,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:40,468 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:40,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:44:40,468 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:40,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:40,468 INFO L85 PathProgramCache]: Analyzing trace with hash 267889063, now seen corresponding path program 11 times [2022-01-31 17:44:40,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:40,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616533756] [2022-01-31 17:44:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:40,469 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:40,469 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:40,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:40,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:40,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:40,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:40,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616533756] [2022-01-31 17:44:40,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [616533756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:40,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:40,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:44:40,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923931501] [2022-01-31 17:44:40,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:40,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:44:40,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:40,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:44:40,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:44:40,611 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:40,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:40,946 INFO L93 Difference]: Finished difference Result 230 states and 253 transitions. [2022-01-31 17:44:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:44:40,947 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 115 [2022-01-31 17:44:40,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:40,947 INFO L225 Difference]: With dead ends: 230 [2022-01-31 17:44:40,947 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 17:44:40,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:44:40,948 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:40,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 17:44:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-01-31 17:44:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.0737704918032787) internal successors, (131), 122 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2022-01-31 17:44:40,953 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 115 [2022-01-31 17:44:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:40,953 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2022-01-31 17:44:40,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2022-01-31 17:44:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:44:40,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:40,954 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:40,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:44:40,954 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:40,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:40,955 INFO L85 PathProgramCache]: Analyzing trace with hash 167523243, now seen corresponding path program 12 times [2022-01-31 17:44:40,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:40,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591699632] [2022-01-31 17:44:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:40,956 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:40,956 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:40,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:40,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:41,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:41,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:41,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591699632] [2022-01-31 17:44:41,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1591699632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:41,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:41,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:44:41,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256459135] [2022-01-31 17:44:41,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:41,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:44:41,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:44:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:44:41,129 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:41,477 INFO L93 Difference]: Finished difference Result 245 states and 268 transitions. [2022-01-31 17:44:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:44:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 17:44:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:41,478 INFO L225 Difference]: With dead ends: 245 [2022-01-31 17:44:41,478 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 17:44:41,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:44:41,479 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:41,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 17:44:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-01-31 17:44:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0692307692307692) internal successors, (139), 130 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 17:44:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2022-01-31 17:44:41,485 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 123 [2022-01-31 17:44:41,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:41,485 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2022-01-31 17:44:41,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2022-01-31 17:44:41,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:44:41,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:41,486 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:41,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:44:41,486 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:41,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1577557977, now seen corresponding path program 13 times [2022-01-31 17:44:41,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:41,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507996898] [2022-01-31 17:44:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:41,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:41,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:41,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:41,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:41,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:41,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:41,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507996898] [2022-01-31 17:44:41,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1507996898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:41,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:41,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:44:41,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307581940] [2022-01-31 17:44:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:41,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:44:41,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:44:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:44:41,666 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:41,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:41,967 INFO L93 Difference]: Finished difference Result 260 states and 283 transitions. [2022-01-31 17:44:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:44:41,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 17:44:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:41,968 INFO L225 Difference]: With dead ends: 260 [2022-01-31 17:44:41,968 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 17:44:41,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:44:41,969 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:41,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 17:44:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-01-31 17:44:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.065217391304348) internal successors, (147), 138 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2022-01-31 17:44:41,974 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 131 [2022-01-31 17:44:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:41,974 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2022-01-31 17:44:41,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2022-01-31 17:44:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:44:41,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:41,977 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:41,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:44:41,977 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash -794175957, now seen corresponding path program 14 times [2022-01-31 17:44:41,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:41,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736366428] [2022-01-31 17:44:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:41,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:41,980 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:41,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:41,982 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:42,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:42,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:42,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736366428] [2022-01-31 17:44:42,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736366428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:42,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:42,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:44:42,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631609866] [2022-01-31 17:44:42,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:42,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:44:42,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:44:42,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:44:42,173 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:42,525 INFO L93 Difference]: Finished difference Result 275 states and 298 transitions. [2022-01-31 17:44:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:44:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 17:44:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:42,526 INFO L225 Difference]: With dead ends: 275 [2022-01-31 17:44:42,526 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 17:44:42,526 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 17:44:42,527 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:42,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:42,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 17:44:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-01-31 17:44:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0616438356164384) internal successors, (155), 146 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 160 transitions. [2022-01-31 17:44:42,534 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 160 transitions. Word has length 139 [2022-01-31 17:44:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:42,534 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 160 transitions. [2022-01-31 17:44:42,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 160 transitions. [2022-01-31 17:44:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:44:42,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:42,535 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:42,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:44:42,535 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:42,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash -565823833, now seen corresponding path program 15 times [2022-01-31 17:44:42,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:42,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342798967] [2022-01-31 17:44:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:42,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:42,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:42,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:42,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:42,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:42,762 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:42,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342798967] [2022-01-31 17:44:42,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [342798967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:42,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:42,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:44:42,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128177107] [2022-01-31 17:44:42,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:42,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:44:42,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:42,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:44:42,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:44:42,764 INFO L87 Difference]: Start difference. First operand 152 states and 160 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 17:44:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:43,150 INFO L93 Difference]: Finished difference Result 290 states and 313 transitions. [2022-01-31 17:44:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:44:43,150 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 147 [2022-01-31 17:44:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:43,151 INFO L225 Difference]: With dead ends: 290 [2022-01-31 17:44:43,152 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 17:44:43,152 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 17:44:43,153 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:43,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 17:44:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-01-31 17:44:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 154 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 17:44:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 168 transitions. [2022-01-31 17:44:43,159 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 168 transitions. Word has length 147 [2022-01-31 17:44:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:43,160 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 168 transitions. [2022-01-31 17:44:43,160 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 17:44:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 168 transitions. [2022-01-31 17:44:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:44:43,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:43,161 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:43,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:44:43,161 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1870800725, now seen corresponding path program 16 times [2022-01-31 17:44:43,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:43,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044455209] [2022-01-31 17:44:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:43,162 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:43,162 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:43,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:43,165 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:43,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:43,351 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:43,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044455209] [2022-01-31 17:44:43,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044455209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:43,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:43,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:44:43,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964753752] [2022-01-31 17:44:43,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:43,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:44:43,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:43,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:44:43,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:44:43,352 INFO L87 Difference]: Start difference. First operand 160 states and 168 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:43,780 INFO L93 Difference]: Finished difference Result 305 states and 328 transitions. [2022-01-31 17:44:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:44:43,781 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 17:44:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:43,781 INFO L225 Difference]: With dead ends: 305 [2022-01-31 17:44:43,781 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 17:44:43,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:44:43,782 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:43,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 17:44:43,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-01-31 17:44:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0555555555555556) internal successors, (171), 162 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2022-01-31 17:44:43,788 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 155 [2022-01-31 17:44:43,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:43,789 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2022-01-31 17:44:43,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:43,789 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2022-01-31 17:44:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:44:43,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:43,790 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:43,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:44:43,790 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:43,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash 444673319, now seen corresponding path program 17 times [2022-01-31 17:44:43,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:43,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366304806] [2022-01-31 17:44:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:43,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:43,791 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:43,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:43,794 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:43,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:44,000 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 17:44:44,000 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:44,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366304806] [2022-01-31 17:44:44,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [366304806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:44,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:44,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:44:44,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69244121] [2022-01-31 17:44:44,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:44,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:44:44,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:44,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:44:44,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:44:44,001 INFO L87 Difference]: Start difference. First operand 168 states and 176 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:44,432 INFO L93 Difference]: Finished difference Result 320 states and 343 transitions. [2022-01-31 17:44:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:44:44,432 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 163 [2022-01-31 17:44:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:44,433 INFO L225 Difference]: With dead ends: 320 [2022-01-31 17:44:44,433 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 17:44:44,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:44:44,434 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:44,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 17:44:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-01-31 17:44:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.0529411764705883) internal successors, (179), 170 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 184 transitions. [2022-01-31 17:44:44,439 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 184 transitions. Word has length 163 [2022-01-31 17:44:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:44,439 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 184 transitions. [2022-01-31 17:44:44,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 184 transitions. [2022-01-31 17:44:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:44:44,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:44,440 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:44,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:44:44,440 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:44,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1884830507, now seen corresponding path program 18 times [2022-01-31 17:44:44,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:44,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587224647] [2022-01-31 17:44:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:44,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:44,443 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:44,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:44,445 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:44,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:44,670 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:44,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587224647] [2022-01-31 17:44:44,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587224647] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:44,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:44,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:44:44,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206202269] [2022-01-31 17:44:44,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:44,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:44:44,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:44,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:44:44,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:44:44,671 INFO L87 Difference]: Start difference. First operand 176 states and 184 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:45,139 INFO L93 Difference]: Finished difference Result 335 states and 358 transitions. [2022-01-31 17:44:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:44:45,140 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 17:44:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:45,140 INFO L225 Difference]: With dead ends: 335 [2022-01-31 17:44:45,141 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 17:44:45,141 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 17:44:45,142 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:45,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 17:44:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-01-31 17:44:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.050561797752809) internal successors, (187), 178 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 17:44:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2022-01-31 17:44:45,147 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 171 [2022-01-31 17:44:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:45,147 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2022-01-31 17:44:45,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2022-01-31 17:44:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:44:45,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:45,149 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:45,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:44:45,149 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash -901168217, now seen corresponding path program 19 times [2022-01-31 17:44:45,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:45,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30533909] [2022-01-31 17:44:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:45,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:45,150 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:45,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:45,152 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:45,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:45,389 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:45,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30533909] [2022-01-31 17:44:45,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [30533909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:45,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:45,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:44:45,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540485089] [2022-01-31 17:44:45,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:45,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:44:45,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:45,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:44:45,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:44:45,397 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:45,891 INFO L93 Difference]: Finished difference Result 350 states and 373 transitions. [2022-01-31 17:44:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:44:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 179 [2022-01-31 17:44:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:45,892 INFO L225 Difference]: With dead ends: 350 [2022-01-31 17:44:45,892 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 17:44:45,893 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 17:44:45,894 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:45,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 17:44:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-01-31 17:44:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0483870967741935) internal successors, (195), 186 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 200 transitions. [2022-01-31 17:44:45,900 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 200 transitions. Word has length 179 [2022-01-31 17:44:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:45,900 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 200 transitions. [2022-01-31 17:44:45,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 200 transitions. [2022-01-31 17:44:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:44:45,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:45,901 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:45,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:44:45,901 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:45,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:45,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1726415445, now seen corresponding path program 20 times [2022-01-31 17:44:45,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:45,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119557836] [2022-01-31 17:44:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:45,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:45,903 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:45,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:45,905 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:46,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:46,190 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:46,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119557836] [2022-01-31 17:44:46,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2119557836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:46,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:46,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:44:46,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967085816] [2022-01-31 17:44:46,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:46,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:44:46,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:46,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:44:46,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:44:46,191 INFO L87 Difference]: Start difference. First operand 192 states and 200 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:46,684 INFO L93 Difference]: Finished difference Result 365 states and 388 transitions. [2022-01-31 17:44:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:44:46,684 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 17:44:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:46,685 INFO L225 Difference]: With dead ends: 365 [2022-01-31 17:44:46,685 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 17:44:46,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:44:46,686 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:46,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 17:44:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-01-31 17:44:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.0463917525773196) internal successors, (203), 194 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 208 transitions. [2022-01-31 17:44:46,692 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 208 transitions. Word has length 187 [2022-01-31 17:44:46,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:46,693 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 208 transitions. [2022-01-31 17:44:46,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:46,693 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 208 transitions. [2022-01-31 17:44:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:44:46,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:46,694 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:46,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:44:46,694 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2134800935, now seen corresponding path program 21 times [2022-01-31 17:44:46,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:46,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973130672] [2022-01-31 17:44:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:46,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:46,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:46,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:46,698 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:46,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:46,972 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973130672] [2022-01-31 17:44:46,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [973130672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:46,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:46,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:44:46,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507084498] [2022-01-31 17:44:46,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:46,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:44:46,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:46,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:44:46,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:44:46,973 INFO L87 Difference]: Start difference. First operand 200 states and 208 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:47,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:47,582 INFO L93 Difference]: Finished difference Result 380 states and 403 transitions. [2022-01-31 17:44:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:44:47,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 195 [2022-01-31 17:44:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:47,583 INFO L225 Difference]: With dead ends: 380 [2022-01-31 17:44:47,583 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 17:44:47,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:44:47,584 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:47,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 17:44:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-01-31 17:44:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.0445544554455446) internal successors, (211), 202 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 17:44:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 216 transitions. [2022-01-31 17:44:47,590 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 216 transitions. Word has length 195 [2022-01-31 17:44:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:47,590 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 216 transitions. [2022-01-31 17:44:47,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 216 transitions. [2022-01-31 17:44:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:44:47,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:47,595 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:47,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:44:47,595 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:47,595 INFO L85 PathProgramCache]: Analyzing trace with hash 899686443, now seen corresponding path program 22 times [2022-01-31 17:44:47,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:47,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090629354] [2022-01-31 17:44:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:47,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:47,596 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:47,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:47,600 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:47,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:47,913 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:47,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090629354] [2022-01-31 17:44:47,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2090629354] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:47,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:47,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:44:47,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115188180] [2022-01-31 17:44:47,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:47,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:44:47,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:44:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:44:47,914 INFO L87 Difference]: Start difference. First operand 208 states and 216 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:48,540 INFO L93 Difference]: Finished difference Result 395 states and 418 transitions. [2022-01-31 17:44:48,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:44:48,540 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 17:44:48,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:48,541 INFO L225 Difference]: With dead ends: 395 [2022-01-31 17:44:48,541 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 17:44:48,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:44:48,542 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:48,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:48,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 17:44:48,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-01-31 17:44:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.042857142857143) internal successors, (219), 210 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2022-01-31 17:44:48,548 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 203 [2022-01-31 17:44:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:48,548 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2022-01-31 17:44:48,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2022-01-31 17:44:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:44:48,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:48,549 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:48,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:44:48,549 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:48,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:48,549 INFO L85 PathProgramCache]: Analyzing trace with hash -385822553, now seen corresponding path program 23 times [2022-01-31 17:44:48,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:48,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440775759] [2022-01-31 17:44:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:48,550 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:48,550 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:48,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:48,553 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:48,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:48,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:48,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440775759] [2022-01-31 17:44:48,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440775759] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:48,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:48,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:44:48,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254001814] [2022-01-31 17:44:48,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:48,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:44:48,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:48,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:44:48,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:44:48,862 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:49,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:49,497 INFO L93 Difference]: Finished difference Result 410 states and 433 transitions. [2022-01-31 17:44:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:44:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 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 211 [2022-01-31 17:44:49,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:49,498 INFO L225 Difference]: With dead ends: 410 [2022-01-31 17:44:49,498 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 17:44:49,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:44:49,499 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:49,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 17:44:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-01-31 17:44:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.0412844036697249) internal successors, (227), 218 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2022-01-31 17:44:49,511 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 211 [2022-01-31 17:44:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:49,511 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2022-01-31 17:44:49,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2022-01-31 17:44:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:44:49,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:49,512 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:49,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:44:49,512 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:49,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1926079147, now seen corresponding path program 24 times [2022-01-31 17:44:49,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:49,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848390736] [2022-01-31 17:44:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:49,514 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:49,514 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:49,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:49,517 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:49,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:49,870 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 17:44:49,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:49,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848390736] [2022-01-31 17:44:49,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [848390736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:49,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:49,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:44:49,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909244458] [2022-01-31 17:44:49,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:49,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:44:49,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:49,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:44:49,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:44:49,879 INFO L87 Difference]: Start difference. First operand 224 states and 232 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:50,325 INFO L93 Difference]: Finished difference Result 425 states and 448 transitions. [2022-01-31 17:44:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:44:50,325 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 17:44:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:50,343 INFO L225 Difference]: With dead ends: 425 [2022-01-31 17:44:50,343 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 17:44:50,345 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 17:44:50,346 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:50,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 17:44:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-01-31 17:44:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0398230088495575) internal successors, (235), 226 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 17:44:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2022-01-31 17:44:50,361 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 219 [2022-01-31 17:44:50,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:50,362 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2022-01-31 17:44:50,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:50,362 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2022-01-31 17:44:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:44:50,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:50,363 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:50,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:44:50,363 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:50,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:50,363 INFO L85 PathProgramCache]: Analyzing trace with hash -718256345, now seen corresponding path program 25 times [2022-01-31 17:44:50,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:50,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739417168] [2022-01-31 17:44:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:50,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:50,365 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:50,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:50,369 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:50,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:50,724 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:50,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739417168] [2022-01-31 17:44:50,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1739417168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:50,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:50,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:44:50,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224950763] [2022-01-31 17:44:50,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:50,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:44:50,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:50,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:44:50,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:44:50,725 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:51,410 INFO L93 Difference]: Finished difference Result 440 states and 463 transitions. [2022-01-31 17:44:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:44:51,410 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 17:44:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:51,411 INFO L225 Difference]: With dead ends: 440 [2022-01-31 17:44:51,411 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 17:44:51,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:44:51,412 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:51,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 17:44:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-01-31 17:44:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.0384615384615385) internal successors, (243), 234 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 248 transitions. [2022-01-31 17:44:51,418 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 248 transitions. Word has length 227 [2022-01-31 17:44:51,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:51,418 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 248 transitions. [2022-01-31 17:44:51,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:51,418 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 248 transitions. [2022-01-31 17:44:51,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:44:51,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:51,419 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:51,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:44:51,420 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:51,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:51,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2139194667, now seen corresponding path program 26 times [2022-01-31 17:44:51,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:51,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136685954] [2022-01-31 17:44:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:51,421 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:51,421 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:51,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:51,425 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:51,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:51,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:51,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136685954] [2022-01-31 17:44:51,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136685954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:51,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:51,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:44:51,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125559091] [2022-01-31 17:44:51,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:51,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:44:51,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:51,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:44:51,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:44:51,834 INFO L87 Difference]: Start difference. First operand 240 states and 248 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:52,513 INFO L93 Difference]: Finished difference Result 455 states and 478 transitions. [2022-01-31 17:44:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:44:52,514 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 17:44:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:52,514 INFO L225 Difference]: With dead ends: 455 [2022-01-31 17:44:52,514 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 17:44:52,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:44:52,516 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:52,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 17:44:52,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-01-31 17:44:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.037190082644628) internal successors, (251), 242 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 256 transitions. [2022-01-31 17:44:52,524 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 256 transitions. Word has length 235 [2022-01-31 17:44:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:52,525 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 256 transitions. [2022-01-31 17:44:52,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:52,525 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 256 transitions. [2022-01-31 17:44:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:44:52,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:52,526 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:52,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:44:52,526 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:52,527 INFO L85 PathProgramCache]: Analyzing trace with hash 795663783, now seen corresponding path program 27 times [2022-01-31 17:44:52,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:52,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752774013] [2022-01-31 17:44:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:52,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:52,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:52,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:52,533 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:52,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:52,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:52,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752774013] [2022-01-31 17:44:52,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1752774013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:52,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:52,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:44:52,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892615379] [2022-01-31 17:44:52,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:52,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:44:52,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:44:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:44:52,850 INFO L87 Difference]: Start difference. First operand 248 states and 256 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:53,357 INFO L93 Difference]: Finished difference Result 470 states and 493 transitions. [2022-01-31 17:44:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:44:53,358 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 243 [2022-01-31 17:44:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:53,359 INFO L225 Difference]: With dead ends: 470 [2022-01-31 17:44:53,359 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 17:44:53,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:44:53,367 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 909 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:53,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [909 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 17:44:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-01-31 17:44:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.036) internal successors, (259), 250 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 17:44:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 264 transitions. [2022-01-31 17:44:53,426 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 264 transitions. Word has length 243 [2022-01-31 17:44:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:53,426 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 264 transitions. [2022-01-31 17:44:53,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 264 transitions. [2022-01-31 17:44:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:44:53,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:53,427 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:53,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:44:53,427 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:53,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1935947861, now seen corresponding path program 28 times [2022-01-31 17:44:53,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:53,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073114560] [2022-01-31 17:44:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:53,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:53,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:53,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:53,434 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:53,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:53,900 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:53,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073114560] [2022-01-31 17:44:53,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2073114560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:53,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:53,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:44:53,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950184227] [2022-01-31 17:44:53,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:53,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:44:53,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:44:53,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:44:53,902 INFO L87 Difference]: Start difference. First operand 256 states and 264 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:54,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:54,716 INFO L93 Difference]: Finished difference Result 485 states and 508 transitions. [2022-01-31 17:44:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:44:54,716 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 17:44:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:54,717 INFO L225 Difference]: With dead ends: 485 [2022-01-31 17:44:54,717 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 17:44:54,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:44:54,719 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 897 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 897 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:54,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [897 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 17:44:54,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-01-31 17:44:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 258 states have (on average 1.0348837209302326) internal successors, (267), 258 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:54,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 272 transitions. [2022-01-31 17:44:54,725 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 272 transitions. Word has length 251 [2022-01-31 17:44:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:54,726 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 272 transitions. [2022-01-31 17:44:54,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 272 transitions. [2022-01-31 17:44:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:44:54,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:54,727 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:54,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:44:54,728 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash 22451239, now seen corresponding path program 29 times [2022-01-31 17:44:54,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:54,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369590831] [2022-01-31 17:44:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:54,729 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:54,729 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:54,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:54,733 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:55,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:55,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:55,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369590831] [2022-01-31 17:44:55,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369590831] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:55,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:55,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:44:55,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834189510] [2022-01-31 17:44:55,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:55,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:44:55,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:44:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:44:55,155 INFO L87 Difference]: Start difference. First operand 264 states and 272 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:56,001 INFO L93 Difference]: Finished difference Result 500 states and 523 transitions. [2022-01-31 17:44:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:44:56,001 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 259 [2022-01-31 17:44:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:56,002 INFO L225 Difference]: With dead ends: 500 [2022-01-31 17:44:56,002 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 17:44:56,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:44:56,003 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 776 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:56,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [776 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 17:44:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-01-31 17:44:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.0338345864661653) internal successors, (275), 266 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 280 transitions. [2022-01-31 17:44:56,009 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 280 transitions. Word has length 259 [2022-01-31 17:44:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:56,009 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 280 transitions. [2022-01-31 17:44:56,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:56,010 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 280 transitions. [2022-01-31 17:44:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:44:56,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:56,011 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:56,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:44:56,011 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:56,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:56,011 INFO L85 PathProgramCache]: Analyzing trace with hash -855872981, now seen corresponding path program 30 times [2022-01-31 17:44:56,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:56,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430098115] [2022-01-31 17:44:56,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:56,012 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:56,012 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:56,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:56,016 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:56,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:56,462 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430098115] [2022-01-31 17:44:56,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1430098115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:56,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:56,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:44:56,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527706814] [2022-01-31 17:44:56,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:56,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:44:56,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:56,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:44:56,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:44:56,464 INFO L87 Difference]: Start difference. First operand 272 states and 280 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:57,303 INFO L93 Difference]: Finished difference Result 515 states and 538 transitions. [2022-01-31 17:44:57,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:44:57,304 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 17:44:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:57,305 INFO L225 Difference]: With dead ends: 515 [2022-01-31 17:44:57,305 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 17:44:57,306 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 17:44:57,307 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 926 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:57,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [926 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 17:44:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-01-31 17:44:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.032846715328467) internal successors, (283), 274 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 17:44:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 288 transitions. [2022-01-31 17:44:57,313 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 288 transitions. Word has length 267 [2022-01-31 17:44:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:57,313 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 288 transitions. [2022-01-31 17:44:57,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 288 transitions. [2022-01-31 17:44:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:44:57,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:57,314 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:57,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:44:57,314 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:57,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1921870503, now seen corresponding path program 31 times [2022-01-31 17:44:57,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:57,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525787935] [2022-01-31 17:44:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:57,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:57,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:57,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:57,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:57,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:57,885 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:57,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525787935] [2022-01-31 17:44:57,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [525787935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:57,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:57,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:44:57,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852074052] [2022-01-31 17:44:57,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:57,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:44:57,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:57,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:44:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:44:57,887 INFO L87 Difference]: Start difference. First operand 280 states and 288 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:58,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:58,532 INFO L93 Difference]: Finished difference Result 530 states and 553 transitions. [2022-01-31 17:44:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:44:58,533 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 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 275 [2022-01-31 17:44:58,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:58,533 INFO L225 Difference]: With dead ends: 530 [2022-01-31 17:44:58,533 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 17:44:58,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:44:58,535 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:58,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 17:44:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-01-31 17:44:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.0319148936170213) internal successors, (291), 282 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 296 transitions. [2022-01-31 17:44:58,541 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 296 transitions. Word has length 275 [2022-01-31 17:44:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:58,541 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 296 transitions. [2022-01-31 17:44:58,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 296 transitions. [2022-01-31 17:44:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 17:44:58,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:58,542 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:58,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:44:58,542 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1971547307, now seen corresponding path program 32 times [2022-01-31 17:44:58,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:58,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618360942] [2022-01-31 17:44:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:58,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:58,544 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:58,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:58,548 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:58,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:58,947 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:58,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618360942] [2022-01-31 17:44:58,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [618360942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:58,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:58,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:44:58,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616621006] [2022-01-31 17:44:58,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:58,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:44:58,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:58,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:44:58,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:44:58,948 INFO L87 Difference]: Start difference. First operand 288 states and 296 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:59,850 INFO L93 Difference]: Finished difference Result 545 states and 568 transitions. [2022-01-31 17:44:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:44:59,850 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-01-31 17:44:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:59,851 INFO L225 Difference]: With dead ends: 545 [2022-01-31 17:44:59,851 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 17:44:59,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:44:59,852 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 949 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:59,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [949 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 17:44:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-01-31 17:44:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.0310344827586206) internal successors, (299), 290 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 304 transitions. [2022-01-31 17:44:59,858 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 304 transitions. Word has length 283 [2022-01-31 17:44:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:59,858 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 304 transitions. [2022-01-31 17:44:59,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 304 transitions. [2022-01-31 17:44:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:44:59,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:59,859 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:59,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:44:59,859 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:59,860 INFO L85 PathProgramCache]: Analyzing trace with hash -927899353, now seen corresponding path program 33 times [2022-01-31 17:44:59,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:59,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196741036] [2022-01-31 17:44:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:59,861 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:59,861 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:59,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:59,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:00,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:00,392 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:00,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196741036] [2022-01-31 17:45:00,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [196741036] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:00,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:00,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:45:00,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163596414] [2022-01-31 17:45:00,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:00,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:45:00,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:45:00,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:45:00,394 INFO L87 Difference]: Start difference. First operand 296 states and 304 transitions. Second operand has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:01,169 INFO L93 Difference]: Finished difference Result 560 states and 583 transitions. [2022-01-31 17:45:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:45:01,170 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 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 291 [2022-01-31 17:45:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:01,171 INFO L225 Difference]: With dead ends: 560 [2022-01-31 17:45:01,171 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 17:45:01,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:45:01,172 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 1196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1196 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:01,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 38 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1196 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:45:01,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 17:45:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2022-01-31 17:45:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.0302013422818792) internal successors, (307), 298 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 17:45:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 312 transitions. [2022-01-31 17:45:01,204 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 312 transitions. Word has length 291 [2022-01-31 17:45:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:01,204 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 312 transitions. [2022-01-31 17:45:01,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 312 transitions. [2022-01-31 17:45:01,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:45:01,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:01,205 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:01,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:45:01,205 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:01,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1122971861, now seen corresponding path program 34 times [2022-01-31 17:45:01,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:01,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090724360] [2022-01-31 17:45:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:01,206 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:01,207 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:01,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:01,212 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:01,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:01,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:01,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090724360] [2022-01-31 17:45:01,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2090724360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:01,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:01,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:45:01,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142467081] [2022-01-31 17:45:01,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:01,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:45:01,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:01,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:45:01,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:45:01,850 INFO L87 Difference]: Start difference. First operand 304 states and 312 transitions. Second operand has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:02,566 INFO L93 Difference]: Finished difference Result 575 states and 598 transitions. [2022-01-31 17:45:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:45:02,566 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 17:45:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:02,568 INFO L225 Difference]: With dead ends: 575 [2022-01-31 17:45:02,568 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 17:45:02,569 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 17:45:02,569 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 934 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 934 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:02,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [934 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:45:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 17:45:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-01-31 17:45:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.0294117647058822) internal successors, (315), 306 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 320 transitions. [2022-01-31 17:45:02,576 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 320 transitions. Word has length 299 [2022-01-31 17:45:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:02,576 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 320 transitions. [2022-01-31 17:45:02,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:02,576 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 320 transitions. [2022-01-31 17:45:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 17:45:02,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:02,577 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:02,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:45:02,577 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:02,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:02,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1734506407, now seen corresponding path program 35 times [2022-01-31 17:45:02,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:02,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649310378] [2022-01-31 17:45:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:02,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:02,578 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:02,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:02,584 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:03,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:03,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:03,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649310378] [2022-01-31 17:45:03,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649310378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:03,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:03,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:45:03,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346910783] [2022-01-31 17:45:03,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:03,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:45:03,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:45:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:45:03,206 INFO L87 Difference]: Start difference. First operand 312 states and 320 transitions. Second operand has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:03,972 INFO L93 Difference]: Finished difference Result 590 states and 613 transitions. [2022-01-31 17:45:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:45:03,973 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 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 307 [2022-01-31 17:45:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:03,974 INFO L225 Difference]: With dead ends: 590 [2022-01-31 17:45:03,974 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 17:45:03,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:45:03,975 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 1127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:03,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1127 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:45:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 17:45:03,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-01-31 17:45:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.0286624203821657) internal successors, (323), 314 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 328 transitions. [2022-01-31 17:45:03,981 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 328 transitions. Word has length 307 [2022-01-31 17:45:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:03,981 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 328 transitions. [2022-01-31 17:45:03,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 328 transitions. [2022-01-31 17:45:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:45:03,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:03,982 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:03,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:45:03,983 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:03,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash -595291733, now seen corresponding path program 36 times [2022-01-31 17:45:03,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:03,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191061278] [2022-01-31 17:45:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:03,984 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:03,984 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:03,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:03,990 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:04,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:04,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:04,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191061278] [2022-01-31 17:45:04,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191061278] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:04,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:04,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:45:04,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758251002] [2022-01-31 17:45:04,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:04,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:45:04,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:45:04,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:45:04,650 INFO L87 Difference]: Start difference. First operand 320 states and 328 transitions. Second operand has 40 states, 40 states have (on average 1.65) internal successors, (66), 39 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:05,400 INFO L93 Difference]: Finished difference Result 605 states and 628 transitions. [2022-01-31 17:45:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:45:05,400 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.65) internal successors, (66), 39 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 17:45:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:05,401 INFO L225 Difference]: With dead ends: 605 [2022-01-31 17:45:05,401 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 17:45:05,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:45:05,402 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:05,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:45:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 17:45:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-01-31 17:45:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.0279503105590062) internal successors, (331), 322 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 17:45:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 336 transitions. [2022-01-31 17:45:05,409 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 336 transitions. Word has length 315 [2022-01-31 17:45:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:05,409 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 336 transitions. [2022-01-31 17:45:05,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.65) internal successors, (66), 39 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 336 transitions. [2022-01-31 17:45:05,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 17:45:05,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:05,410 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:05,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:45:05,411 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:05,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:05,411 INFO L85 PathProgramCache]: Analyzing trace with hash -801067481, now seen corresponding path program 37 times [2022-01-31 17:45:05,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:05,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038378279] [2022-01-31 17:45:05,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:05,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:05,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:05,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:05,436 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:06,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:06,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:06,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038378279] [2022-01-31 17:45:06,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2038378279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:06,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:06,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:45:06,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273832162] [2022-01-31 17:45:06,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:06,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:45:06,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:06,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:45:06,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:45:06,086 INFO L87 Difference]: Start difference. First operand 328 states and 336 transitions. Second operand has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:07,126 INFO L93 Difference]: Finished difference Result 620 states and 643 transitions. [2022-01-31 17:45:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:45:07,126 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 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 323 [2022-01-31 17:45:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:07,127 INFO L225 Difference]: With dead ends: 620 [2022-01-31 17:45:07,127 INFO L226 Difference]: Without dead ends: 336 [2022-01-31 17:45:07,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:45:07,128 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 1269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1269 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:07,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1269 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:07,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-01-31 17:45:07,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2022-01-31 17:45:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 330 states have (on average 1.0272727272727273) internal successors, (339), 330 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 344 transitions. [2022-01-31 17:45:07,135 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 344 transitions. Word has length 323 [2022-01-31 17:45:07,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:07,135 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 344 transitions. [2022-01-31 17:45:07,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:07,135 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 344 transitions. [2022-01-31 17:45:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 17:45:07,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:07,137 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:07,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:45:07,137 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:07,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:07,137 INFO L85 PathProgramCache]: Analyzing trace with hash 247378987, now seen corresponding path program 38 times [2022-01-31 17:45:07,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:07,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108351452] [2022-01-31 17:45:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:07,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:07,138 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:07,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:07,144 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:07,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:07,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:07,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108351452] [2022-01-31 17:45:07,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2108351452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:07,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:07,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:45:07,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945570834] [2022-01-31 17:45:07,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:07,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:45:07,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:07,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:45:07,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:45:07,626 INFO L87 Difference]: Start difference. First operand 336 states and 344 transitions. Second operand has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:08,677 INFO L93 Difference]: Finished difference Result 635 states and 658 transitions. [2022-01-31 17:45:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:45:08,678 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 331 [2022-01-31 17:45:08,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:08,679 INFO L225 Difference]: With dead ends: 635 [2022-01-31 17:45:08,679 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 17:45:08,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:45:08,681 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:08,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1114 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 17:45:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-01-31 17:45:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 338 states have (on average 1.0266272189349113) internal successors, (347), 338 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 352 transitions. [2022-01-31 17:45:08,692 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 352 transitions. Word has length 331 [2022-01-31 17:45:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:08,692 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 352 transitions. [2022-01-31 17:45:08,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 352 transitions. [2022-01-31 17:45:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 17:45:08,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:08,694 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:08,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:45:08,694 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1561590617, now seen corresponding path program 39 times [2022-01-31 17:45:08,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:08,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287630669] [2022-01-31 17:45:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:08,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:08,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:08,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:08,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:09,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:09,238 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:09,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287630669] [2022-01-31 17:45:09,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [287630669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:09,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:09,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:45:09,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370673945] [2022-01-31 17:45:09,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:09,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:45:09,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:09,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:45:09,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:45:09,241 INFO L87 Difference]: Start difference. First operand 344 states and 352 transitions. Second operand has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:10,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:10,043 INFO L93 Difference]: Finished difference Result 650 states and 673 transitions. [2022-01-31 17:45:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:45:10,043 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 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 339 [2022-01-31 17:45:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:10,044 INFO L225 Difference]: With dead ends: 650 [2022-01-31 17:45:10,044 INFO L226 Difference]: Without dead ends: 352 [2022-01-31 17:45:10,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:45:10,069 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:10,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:45:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-31 17:45:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-01-31 17:45:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.0260115606936415) internal successors, (355), 346 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 17:45:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 360 transitions. [2022-01-31 17:45:10,094 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 360 transitions. Word has length 339 [2022-01-31 17:45:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:10,094 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 360 transitions. [2022-01-31 17:45:10,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 360 transitions. [2022-01-31 17:45:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 17:45:10,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:10,096 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:10,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:45:10,096 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:10,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:10,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1868613973, now seen corresponding path program 40 times [2022-01-31 17:45:10,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:10,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768304322] [2022-01-31 17:45:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:10,097 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:10,097 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:10,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:10,126 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:10,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:10,847 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 17:45:10,847 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:10,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768304322] [2022-01-31 17:45:10,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [768304322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:10,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:10,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:45:10,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303460986] [2022-01-31 17:45:10,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:10,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:45:10,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:45:10,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:45:10,849 INFO L87 Difference]: Start difference. First operand 352 states and 360 transitions. Second operand has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 43 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:12,002 INFO L93 Difference]: Finished difference Result 665 states and 688 transitions. [2022-01-31 17:45:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:45:12,002 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 43 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 347 [2022-01-31 17:45:12,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:12,003 INFO L225 Difference]: With dead ends: 665 [2022-01-31 17:45:12,003 INFO L226 Difference]: Without dead ends: 360 [2022-01-31 17:45:12,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:45:12,008 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:12,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:12,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-31 17:45:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-01-31 17:45:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.0254237288135593) internal successors, (363), 354 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 368 transitions. [2022-01-31 17:45:12,026 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 368 transitions. Word has length 347 [2022-01-31 17:45:12,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:12,026 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 368 transitions. [2022-01-31 17:45:12,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 43 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:12,027 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 368 transitions. [2022-01-31 17:45:12,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 17:45:12,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:12,028 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:12,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:45:12,028 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1660650713, now seen corresponding path program 41 times [2022-01-31 17:45:12,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:12,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693404024] [2022-01-31 17:45:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:12,029 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:12,029 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:12,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:12,036 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:12,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:12,670 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693404024] [2022-01-31 17:45:12,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693404024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:12,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:12,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:45:12,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710326649] [2022-01-31 17:45:12,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:12,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:45:12,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:12,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:45:12,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:45:12,672 INFO L87 Difference]: Start difference. First operand 360 states and 368 transitions. Second operand has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:13,547 INFO L93 Difference]: Finished difference Result 680 states and 703 transitions. [2022-01-31 17:45:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:45:13,547 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 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 355 [2022-01-31 17:45:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:13,548 INFO L225 Difference]: With dead ends: 680 [2022-01-31 17:45:13,549 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 17:45:13,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:45:13,550 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 1281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1281 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:13,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1281 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:45:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 17:45:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2022-01-31 17:45:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 362 states have (on average 1.0248618784530388) internal successors, (371), 362 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 376 transitions. [2022-01-31 17:45:13,558 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 376 transitions. Word has length 355 [2022-01-31 17:45:13,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:13,558 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 376 transitions. [2022-01-31 17:45:13,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:13,558 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 376 transitions. [2022-01-31 17:45:13,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 17:45:13,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:13,560 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:13,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:45:13,560 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:13,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:13,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1593435861, now seen corresponding path program 42 times [2022-01-31 17:45:13,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:13,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749582349] [2022-01-31 17:45:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:13,561 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:13,561 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:13,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:13,569 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:14,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:14,117 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:14,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749582349] [2022-01-31 17:45:14,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749582349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:14,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:14,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:45:14,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427008387] [2022-01-31 17:45:14,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:14,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:45:14,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:45:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:45:14,119 INFO L87 Difference]: Start difference. First operand 368 states and 376 transitions. Second operand has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 45 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:15,272 INFO L93 Difference]: Finished difference Result 695 states and 718 transitions. [2022-01-31 17:45:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:45:15,272 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 45 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 17:45:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:15,273 INFO L225 Difference]: With dead ends: 695 [2022-01-31 17:45:15,273 INFO L226 Difference]: Without dead ends: 376 [2022-01-31 17:45:15,274 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 17:45:15,274 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 1077 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1077 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:15,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1077 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-31 17:45:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2022-01-31 17:45:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.0243243243243243) internal successors, (379), 370 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 17:45:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 384 transitions. [2022-01-31 17:45:15,281 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 384 transitions. Word has length 363 [2022-01-31 17:45:15,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:15,281 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 384 transitions. [2022-01-31 17:45:15,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 45 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 384 transitions. [2022-01-31 17:45:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 17:45:15,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:15,283 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:15,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:45:15,283 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:15,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1708519001, now seen corresponding path program 43 times [2022-01-31 17:45:15,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:15,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948837877] [2022-01-31 17:45:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:15,284 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:15,284 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:15,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:15,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:15,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:15,873 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:15,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948837877] [2022-01-31 17:45:15,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [948837877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:15,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:15,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:45:15,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227712439] [2022-01-31 17:45:15,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:15,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:45:15,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:15,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:45:15,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:45:15,874 INFO L87 Difference]: Start difference. First operand 376 states and 384 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:16,950 INFO L93 Difference]: Finished difference Result 710 states and 733 transitions. [2022-01-31 17:45:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:45:16,950 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 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 371 [2022-01-31 17:45:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:16,951 INFO L225 Difference]: With dead ends: 710 [2022-01-31 17:45:16,951 INFO L226 Difference]: Without dead ends: 384 [2022-01-31 17:45:16,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:45:16,953 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 1562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1562 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:16,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1562 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-31 17:45:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-01-31 17:45:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.0238095238095237) internal successors, (387), 378 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 392 transitions. [2022-01-31 17:45:16,962 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 392 transitions. Word has length 371 [2022-01-31 17:45:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:16,962 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 392 transitions. [2022-01-31 17:45:16,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 392 transitions. [2022-01-31 17:45:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-01-31 17:45:16,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:16,964 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:16,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:45:16,964 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:16,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2133632085, now seen corresponding path program 44 times [2022-01-31 17:45:16,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:16,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307951358] [2022-01-31 17:45:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:16,966 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:16,966 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:16,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:16,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:17,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:17,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:17,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307951358] [2022-01-31 17:45:17,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1307951358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:17,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:17,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:45:17,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504035157] [2022-01-31 17:45:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:17,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:45:17,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:17,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:45:17,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:45:17,824 INFO L87 Difference]: Start difference. First operand 384 states and 392 transitions. Second operand has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:18,784 INFO L93 Difference]: Finished difference Result 725 states and 748 transitions. [2022-01-31 17:45:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:45:18,784 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 379 [2022-01-31 17:45:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:18,785 INFO L225 Difference]: With dead ends: 725 [2022-01-31 17:45:18,785 INFO L226 Difference]: Without dead ends: 392 [2022-01-31 17:45:18,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:45:18,787 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 1267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1267 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:18,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1267 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-31 17:45:18,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-01-31 17:45:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 386 states have (on average 1.0233160621761659) internal successors, (395), 386 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 400 transitions. [2022-01-31 17:45:18,794 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 400 transitions. Word has length 379 [2022-01-31 17:45:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:18,795 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 400 transitions. [2022-01-31 17:45:18,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 400 transitions. [2022-01-31 17:45:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-01-31 17:45:18,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:18,827 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:18,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:45:18,828 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:18,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1812150233, now seen corresponding path program 45 times [2022-01-31 17:45:18,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:18,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490499296] [2022-01-31 17:45:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:18,830 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:18,830 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:18,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:18,838 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:19,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:19,480 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:19,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490499296] [2022-01-31 17:45:19,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1490499296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:19,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:19,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:45:19,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159628749] [2022-01-31 17:45:19,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:19,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:45:19,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:45:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:45:19,481 INFO L87 Difference]: Start difference. First operand 392 states and 400 transitions. Second operand has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:20,855 INFO L93 Difference]: Finished difference Result 740 states and 763 transitions. [2022-01-31 17:45:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:45:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 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 387 [2022-01-31 17:45:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:20,856 INFO L225 Difference]: With dead ends: 740 [2022-01-31 17:45:20,856 INFO L226 Difference]: Without dead ends: 400 [2022-01-31 17:45:20,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:45:20,859 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 1590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1590 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:20,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1590 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-01-31 17:45:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-01-31 17:45:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 394 states have (on average 1.0228426395939085) internal successors, (403), 394 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 17:45:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 408 transitions. [2022-01-31 17:45:20,867 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 408 transitions. Word has length 387 [2022-01-31 17:45:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:20,867 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 408 transitions. [2022-01-31 17:45:20,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 408 transitions. [2022-01-31 17:45:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-01-31 17:45:20,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:20,869 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:20,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:45:20,869 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1927740971, now seen corresponding path program 46 times [2022-01-31 17:45:20,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:20,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679715316] [2022-01-31 17:45:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:20,870 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:20,870 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:20,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:20,879 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:21,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:21,506 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:21,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679715316] [2022-01-31 17:45:21,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1679715316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:21,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:21,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:45:21,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790156940] [2022-01-31 17:45:21,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:21,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:45:21,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:45:21,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:45:21,507 INFO L87 Difference]: Start difference. First operand 400 states and 408 transitions. Second operand has 50 states, 50 states have (on average 1.52) internal successors, (76), 49 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:22,570 INFO L93 Difference]: Finished difference Result 755 states and 778 transitions. [2022-01-31 17:45:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:45:22,570 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 49 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2022-01-31 17:45:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:22,571 INFO L225 Difference]: With dead ends: 755 [2022-01-31 17:45:22,571 INFO L226 Difference]: Without dead ends: 408 [2022-01-31 17:45:22,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:45:22,573 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 1391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1391 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:22,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1391 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-31 17:45:22,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2022-01-31 17:45:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 402 states have (on average 1.0223880597014925) internal successors, (411), 402 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 416 transitions. [2022-01-31 17:45:22,581 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 416 transitions. Word has length 395 [2022-01-31 17:45:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:22,581 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 416 transitions. [2022-01-31 17:45:22,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 49 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:22,581 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 416 transitions. [2022-01-31 17:45:22,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-01-31 17:45:22,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:22,583 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:22,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:45:22,583 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:22,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:22,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1575182681, now seen corresponding path program 47 times [2022-01-31 17:45:22,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:22,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614434113] [2022-01-31 17:45:22,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:22,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:22,584 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:22,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:22,593 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:23,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:23,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:23,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614434113] [2022-01-31 17:45:23,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1614434113] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:23,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:23,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:45:23,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924429817] [2022-01-31 17:45:23,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:23,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:45:23,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:23,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:45:23,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:45:23,438 INFO L87 Difference]: Start difference. First operand 408 states and 416 transitions. Second operand has 51 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 50 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:25,173 INFO L93 Difference]: Finished difference Result 770 states and 793 transitions. [2022-01-31 17:45:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:45:25,173 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 50 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 403 [2022-01-31 17:45:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:25,174 INFO L225 Difference]: With dead ends: 770 [2022-01-31 17:45:25,174 INFO L226 Difference]: Without dead ends: 416 [2022-01-31 17:45:25,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:45:25,176 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:25,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:45:25,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-01-31 17:45:25,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-01-31 17:45:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 410 states have (on average 1.0219512195121951) internal successors, (419), 410 states have internal predecessors, (419), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 424 transitions. [2022-01-31 17:45:25,185 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 424 transitions. Word has length 403 [2022-01-31 17:45:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:25,185 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 424 transitions. [2022-01-31 17:45:25,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 50 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,185 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 424 transitions. [2022-01-31 17:45:25,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 17:45:25,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:25,186 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:25,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:45:25,188 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:25,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1138687829, now seen corresponding path program 48 times [2022-01-31 17:45:25,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:25,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795244483] [2022-01-31 17:45:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:25,190 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:25,190 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:25,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:25,199 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:26,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:26,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795244483] [2022-01-31 17:45:26,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [795244483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:26,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:26,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:45:26,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473964999] [2022-01-31 17:45:26,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:26,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:45:26,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:26,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:45:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:45:26,235 INFO L87 Difference]: Start difference. First operand 416 states and 424 transitions. Second operand has 52 states, 52 states have (on average 1.5) internal successors, (78), 51 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:27,751 INFO L93 Difference]: Finished difference Result 785 states and 808 transitions. [2022-01-31 17:45:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:45:27,751 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5) internal successors, (78), 51 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 17:45:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:27,753 INFO L225 Difference]: With dead ends: 785 [2022-01-31 17:45:27,753 INFO L226 Difference]: Without dead ends: 424 [2022-01-31 17:45:27,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:45:27,754 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 1644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1644 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:27,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1644 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-31 17:45:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2022-01-31 17:45:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 418 states have (on average 1.0215311004784688) internal successors, (427), 418 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 17:45:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 432 transitions. [2022-01-31 17:45:27,764 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 432 transitions. Word has length 411 [2022-01-31 17:45:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:27,765 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 432 transitions. [2022-01-31 17:45:27,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5) internal successors, (78), 51 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 432 transitions. [2022-01-31 17:45:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-01-31 17:45:27,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:27,780 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:27,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:45:27,780 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:27,781 INFO L85 PathProgramCache]: Analyzing trace with hash -97938137, now seen corresponding path program 49 times [2022-01-31 17:45:27,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:27,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283275304] [2022-01-31 17:45:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:27,782 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:27,782 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:27,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:27,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:28,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:28,503 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 17:45:28,503 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:28,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283275304] [2022-01-31 17:45:28,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [283275304] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:28,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:28,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:45:28,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519025896] [2022-01-31 17:45:28,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:28,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:45:28,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:45:28,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:45:28,504 INFO L87 Difference]: Start difference. First operand 424 states and 432 transitions. Second operand has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:29,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:29,652 INFO L93 Difference]: Finished difference Result 800 states and 823 transitions. [2022-01-31 17:45:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:45:29,653 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 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 419 [2022-01-31 17:45:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:29,654 INFO L225 Difference]: With dead ends: 800 [2022-01-31 17:45:29,654 INFO L226 Difference]: Without dead ends: 432 [2022-01-31 17:45:29,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:45:29,656 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1581 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:29,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1581 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-31 17:45:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2022-01-31 17:45:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 426 states have (on average 1.0211267605633803) internal successors, (435), 426 states have internal predecessors, (435), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 440 transitions. [2022-01-31 17:45:29,664 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 440 transitions. Word has length 419 [2022-01-31 17:45:29,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:29,664 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 440 transitions. [2022-01-31 17:45:29,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 440 transitions. [2022-01-31 17:45:29,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-01-31 17:45:29,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:29,666 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:29,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:45:29,666 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:29,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1553898709, now seen corresponding path program 50 times [2022-01-31 17:45:29,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:29,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667347957] [2022-01-31 17:45:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:29,667 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:29,667 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:29,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:29,677 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:30,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:30,627 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:30,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667347957] [2022-01-31 17:45:30,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [667347957] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:30,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:30,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:45:30,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050417776] [2022-01-31 17:45:30,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:30,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:45:30,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:30,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:45:30,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:45:30,629 INFO L87 Difference]: Start difference. First operand 432 states and 440 transitions. Second operand has 54 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 53 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:31,889 INFO L93 Difference]: Finished difference Result 815 states and 838 transitions. [2022-01-31 17:45:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:45:31,889 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 53 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 427 [2022-01-31 17:45:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:31,892 INFO L225 Difference]: With dead ends: 815 [2022-01-31 17:45:31,892 INFO L226 Difference]: Without dead ends: 440 [2022-01-31 17:45:31,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:45:31,894 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 1620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1620 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:31,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1620 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-31 17:45:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-01-31 17:45:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 434 states have (on average 1.0207373271889402) internal successors, (443), 434 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 448 transitions. [2022-01-31 17:45:31,902 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 448 transitions. Word has length 427 [2022-01-31 17:45:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:31,902 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 448 transitions. [2022-01-31 17:45:31,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 53 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 448 transitions. [2022-01-31 17:45:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 17:45:31,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:31,904 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:31,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:45:31,904 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:31,905 INFO L85 PathProgramCache]: Analyzing trace with hash -272389209, now seen corresponding path program 51 times [2022-01-31 17:45:31,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:31,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225086143] [2022-01-31 17:45:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:31,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:31,906 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:31,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:31,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:32,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:32,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:32,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225086143] [2022-01-31 17:45:32,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [225086143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:32,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:32,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:45:32,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004972845] [2022-01-31 17:45:32,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:32,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:45:32,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:32,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:45:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:45:32,633 INFO L87 Difference]: Start difference. First operand 440 states and 448 transitions. Second operand has 55 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 54 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:33,905 INFO L93 Difference]: Finished difference Result 830 states and 853 transitions. [2022-01-31 17:45:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:45:33,905 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 54 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 435 [2022-01-31 17:45:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:33,906 INFO L225 Difference]: With dead ends: 830 [2022-01-31 17:45:33,906 INFO L226 Difference]: Without dead ends: 448 [2022-01-31 17:45:33,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:45:33,908 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 1387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1387 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:33,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1387 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-31 17:45:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2022-01-31 17:45:33,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 442 states have (on average 1.0203619909502262) internal successors, (451), 442 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 17:45:33,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 456 transitions. [2022-01-31 17:45:33,917 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 456 transitions. Word has length 435 [2022-01-31 17:45:33,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:33,917 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 456 transitions. [2022-01-31 17:45:33,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 54 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:33,917 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 456 transitions. [2022-01-31 17:45:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-01-31 17:45:33,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:33,919 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:33,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:45:33,919 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1904747947, now seen corresponding path program 52 times [2022-01-31 17:45:33,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:33,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441703726] [2022-01-31 17:45:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:33,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:33,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:33,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:33,932 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:35,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:35,032 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441703726] [2022-01-31 17:45:35,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1441703726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:35,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:35,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:45:35,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197588530] [2022-01-31 17:45:35,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:35,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:45:35,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:35,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:45:35,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:45:35,033 INFO L87 Difference]: Start difference. First operand 448 states and 456 transitions. Second operand has 56 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 55 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:36,982 INFO L93 Difference]: Finished difference Result 845 states and 868 transitions. [2022-01-31 17:45:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:45:36,982 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 55 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 443 [2022-01-31 17:45:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:36,983 INFO L225 Difference]: With dead ends: 845 [2022-01-31 17:45:36,983 INFO L226 Difference]: Without dead ends: 456 [2022-01-31 17:45:36,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:45:36,989 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 1631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1631 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:36,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 88 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1631 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:45:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-31 17:45:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2022-01-31 17:45:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 450 states have (on average 1.02) internal successors, (459), 450 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 464 transitions. [2022-01-31 17:45:37,008 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 464 transitions. Word has length 443 [2022-01-31 17:45:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:37,008 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 464 transitions. [2022-01-31 17:45:37,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 55 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 464 transitions. [2022-01-31 17:45:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-01-31 17:45:37,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:37,010 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:37,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:45:37,010 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:37,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:37,010 INFO L85 PathProgramCache]: Analyzing trace with hash -192224729, now seen corresponding path program 53 times [2022-01-31 17:45:37,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:37,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263910196] [2022-01-31 17:45:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:37,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:37,011 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:37,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:37,023 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:37,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:37,979 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:37,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263910196] [2022-01-31 17:45:37,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263910196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:37,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:37,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:45:37,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616466157] [2022-01-31 17:45:37,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:37,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:45:37,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:45:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:45:37,981 INFO L87 Difference]: Start difference. First operand 456 states and 464 transitions. Second operand has 57 states, 57 states have (on average 1.456140350877193) internal successors, (83), 56 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:39,846 INFO L93 Difference]: Finished difference Result 860 states and 883 transitions. [2022-01-31 17:45:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:45:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.456140350877193) internal successors, (83), 56 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 451 [2022-01-31 17:45:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:39,848 INFO L225 Difference]: With dead ends: 860 [2022-01-31 17:45:39,848 INFO L226 Difference]: Without dead ends: 464 [2022-01-31 17:45:39,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:45:39,850 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 1690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1690 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:39,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1690 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:39,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-01-31 17:45:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2022-01-31 17:45:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 458 states have (on average 1.019650655021834) internal successors, (467), 458 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 472 transitions. [2022-01-31 17:45:39,879 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 472 transitions. Word has length 451 [2022-01-31 17:45:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:39,880 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 472 transitions. [2022-01-31 17:45:39,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.456140350877193) internal successors, (83), 56 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 472 transitions. [2022-01-31 17:45:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-01-31 17:45:39,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:39,882 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:39,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:45:39,882 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:39,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:39,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1903511595, now seen corresponding path program 54 times [2022-01-31 17:45:39,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:39,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493276944] [2022-01-31 17:45:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:39,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:39,883 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:39,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:39,894 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:41,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:41,073 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 17:45:41,073 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:41,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493276944] [2022-01-31 17:45:41,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1493276944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:41,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:41,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:45:41,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533485305] [2022-01-31 17:45:41,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:41,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:45:41,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:41,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:45:41,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:45:41,075 INFO L87 Difference]: Start difference. First operand 464 states and 472 transitions. Second operand has 58 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 57 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:42,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:42,489 INFO L93 Difference]: Finished difference Result 875 states and 898 transitions. [2022-01-31 17:45:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:45:42,489 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 57 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 459 [2022-01-31 17:45:42,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:42,490 INFO L225 Difference]: With dead ends: 875 [2022-01-31 17:45:42,490 INFO L226 Difference]: Without dead ends: 472 [2022-01-31 17:45:42,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:45:42,493 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 1949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1949 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:42,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1949 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:42,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-31 17:45:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 472. [2022-01-31 17:45:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 466 states have (on average 1.01931330472103) internal successors, (475), 466 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 17:45:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 480 transitions. [2022-01-31 17:45:42,502 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 480 transitions. Word has length 459 [2022-01-31 17:45:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:42,502 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 480 transitions. [2022-01-31 17:45:42,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 57 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 480 transitions. [2022-01-31 17:45:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-01-31 17:45:42,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:42,504 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:42,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:45:42,504 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1742784345, now seen corresponding path program 55 times [2022-01-31 17:45:42,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:42,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977306475] [2022-01-31 17:45:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:42,507 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:42,507 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:42,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:42,519 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:43,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:43,360 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977306475] [2022-01-31 17:45:43,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1977306475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:43,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:43,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:45:43,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054135109] [2022-01-31 17:45:43,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:43,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:45:43,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:43,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:45:43,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:45:43,362 INFO L87 Difference]: Start difference. First operand 472 states and 480 transitions. Second operand has 59 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 58 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:44,904 INFO L93 Difference]: Finished difference Result 890 states and 913 transitions. [2022-01-31 17:45:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:45:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 58 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 467 [2022-01-31 17:45:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:44,906 INFO L225 Difference]: With dead ends: 890 [2022-01-31 17:45:44,906 INFO L226 Difference]: Without dead ends: 480 [2022-01-31 17:45:44,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:45:44,908 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 2351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2351 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:44,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2351 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-31 17:45:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 480. [2022-01-31 17:45:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 474 states have (on average 1.018987341772152) internal successors, (483), 474 states have internal predecessors, (483), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 488 transitions. [2022-01-31 17:45:44,917 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 488 transitions. Word has length 467 [2022-01-31 17:45:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:44,918 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 488 transitions. [2022-01-31 17:45:44,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 58 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 488 transitions. [2022-01-31 17:45:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-01-31 17:45:44,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:44,920 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:44,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:45:44,920 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash -267859285, now seen corresponding path program 56 times [2022-01-31 17:45:44,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:44,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9538899] [2022-01-31 17:45:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:44,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:44,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:44,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:44,936 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:45,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:45,811 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:45,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9538899] [2022-01-31 17:45:45,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [9538899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:45,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:45,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:45:45,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18245567] [2022-01-31 17:45:45,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:45,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:45:45,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:45:45,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:45:45,812 INFO L87 Difference]: Start difference. First operand 480 states and 488 transitions. Second operand has 60 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 59 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:47,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:47,347 INFO L93 Difference]: Finished difference Result 905 states and 928 transitions. [2022-01-31 17:45:47,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:45:47,348 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 59 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 475 [2022-01-31 17:45:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:47,349 INFO L225 Difference]: With dead ends: 905 [2022-01-31 17:45:47,349 INFO L226 Difference]: Without dead ends: 488 [2022-01-31 17:45:47,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:45:47,351 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 1808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1808 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:47,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1808 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-31 17:45:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2022-01-31 17:45:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 482 states have (on average 1.0186721991701244) internal successors, (491), 482 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 496 transitions. [2022-01-31 17:45:47,360 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 496 transitions. Word has length 475 [2022-01-31 17:45:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:47,360 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 496 transitions. [2022-01-31 17:45:47,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 59 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 496 transitions. [2022-01-31 17:45:47,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-01-31 17:45:47,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:47,363 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:47,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:45:47,363 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:47,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2011123929, now seen corresponding path program 57 times [2022-01-31 17:45:47,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:47,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324527186] [2022-01-31 17:45:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:47,364 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:47,364 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:47,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:47,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:48,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:48,497 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 17:45:48,497 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:48,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324527186] [2022-01-31 17:45:48,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [324527186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:48,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:48,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:45:48,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156262298] [2022-01-31 17:45:48,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:48,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:45:48,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:45:48,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:45:48,498 INFO L87 Difference]: Start difference. First operand 488 states and 496 transitions. Second operand has 61 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 60 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:50,492 INFO L93 Difference]: Finished difference Result 920 states and 943 transitions. [2022-01-31 17:45:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:45:50,492 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 60 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 483 [2022-01-31 17:45:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:50,494 INFO L225 Difference]: With dead ends: 920 [2022-01-31 17:45:50,494 INFO L226 Difference]: Without dead ends: 496 [2022-01-31 17:45:50,496 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 17:45:50,496 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 2033 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2033 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:50,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2033 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-31 17:45:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2022-01-31 17:45:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 490 states have (on average 1.0183673469387755) internal successors, (499), 490 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 17:45:50,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 504 transitions. [2022-01-31 17:45:50,505 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 504 transitions. Word has length 483 [2022-01-31 17:45:50,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:50,505 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 504 transitions. [2022-01-31 17:45:50,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 60 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:50,506 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 504 transitions. [2022-01-31 17:45:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-01-31 17:45:50,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:50,524 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:50,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:45:50,524 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:50,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1008905515, now seen corresponding path program 58 times [2022-01-31 17:45:50,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:50,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76245230] [2022-01-31 17:45:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:50,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:50,525 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:50,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:50,543 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:51,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:51,644 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:51,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76245230] [2022-01-31 17:45:51,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [76245230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:51,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:51,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:45:51,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125557805] [2022-01-31 17:45:51,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:51,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:45:51,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:51,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:45:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:45:51,645 INFO L87 Difference]: Start difference. First operand 496 states and 504 transitions. Second operand has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 61 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:53,211 INFO L93 Difference]: Finished difference Result 935 states and 958 transitions. [2022-01-31 17:45:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:45:53,212 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 61 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 491 [2022-01-31 17:45:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:53,213 INFO L225 Difference]: With dead ends: 935 [2022-01-31 17:45:53,213 INFO L226 Difference]: Without dead ends: 504 [2022-01-31 17:45:53,215 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 17:45:53,215 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 1793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1793 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:53,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1793 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-31 17:45:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2022-01-31 17:45:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 498 states have (on average 1.0180722891566265) internal successors, (507), 498 states have internal predecessors, (507), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:53,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 512 transitions. [2022-01-31 17:45:53,225 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 512 transitions. Word has length 491 [2022-01-31 17:45:53,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:53,225 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 512 transitions. [2022-01-31 17:45:53,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 61 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 512 transitions. [2022-01-31 17:45:53,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-01-31 17:45:53,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:53,227 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:53,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:45:53,227 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:53,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1875950169, now seen corresponding path program 59 times [2022-01-31 17:45:53,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:53,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279700002] [2022-01-31 17:45:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:53,229 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:53,229 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:53,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:53,267 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:54,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:54,174 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:54,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279700002] [2022-01-31 17:45:54,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279700002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:54,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:54,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:45:54,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557696483] [2022-01-31 17:45:54,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:54,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:45:54,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:54,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:45:54,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:45:54,176 INFO L87 Difference]: Start difference. First operand 504 states and 512 transitions. Second operand has 63 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 62 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:55,850 INFO L93 Difference]: Finished difference Result 950 states and 973 transitions. [2022-01-31 17:45:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:45:55,850 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 62 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 499 [2022-01-31 17:45:55,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:55,857 INFO L225 Difference]: With dead ends: 950 [2022-01-31 17:45:55,857 INFO L226 Difference]: Without dead ends: 512 [2022-01-31 17:45:55,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:45:55,862 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 2070 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2070 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:55,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2070 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-31 17:45:55,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-01-31 17:45:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 506 states have (on average 1.017786561264822) internal successors, (515), 506 states have internal predecessors, (515), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 520 transitions. [2022-01-31 17:45:55,871 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 520 transitions. Word has length 499 [2022-01-31 17:45:55,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:55,871 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 520 transitions. [2022-01-31 17:45:55,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 62 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 520 transitions. [2022-01-31 17:45:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-01-31 17:45:55,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:55,874 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:55,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:45:55,874 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:55,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1499271253, now seen corresponding path program 60 times [2022-01-31 17:45:55,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:55,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489433722] [2022-01-31 17:45:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:55,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:55,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:55,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:55,889 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:57,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:57,249 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 17:45:57,249 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:57,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489433722] [2022-01-31 17:45:57,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489433722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:57,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:57,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:45:57,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650491750] [2022-01-31 17:45:57,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:57,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:45:57,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:57,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:45:57,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:45:57,251 INFO L87 Difference]: Start difference. First operand 512 states and 520 transitions. Second operand has 64 states, 64 states have (on average 1.40625) internal successors, (90), 63 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:59,024 INFO L93 Difference]: Finished difference Result 965 states and 988 transitions. [2022-01-31 17:45:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:45:59,025 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.40625) internal successors, (90), 63 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 507 [2022-01-31 17:45:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:59,026 INFO L225 Difference]: With dead ends: 965 [2022-01-31 17:45:59,026 INFO L226 Difference]: Without dead ends: 520 [2022-01-31 17:45:59,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:45:59,027 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 2719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2719 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:59,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 3312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2719 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:59,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-31 17:45:59,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-01-31 17:45:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 514 states have (on average 1.017509727626459) internal successors, (523), 514 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 17:45:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 528 transitions. [2022-01-31 17:45:59,036 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 528 transitions. Word has length 507 [2022-01-31 17:45:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:59,037 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 528 transitions. [2022-01-31 17:45:59,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.40625) internal successors, (90), 63 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 528 transitions. [2022-01-31 17:45:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2022-01-31 17:45:59,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:59,039 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:59,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:45:59,039 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:59,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:59,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1712653273, now seen corresponding path program 61 times [2022-01-31 17:45:59,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:59,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144045226] [2022-01-31 17:45:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:59,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:59,040 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:59,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:59,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:00,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:00,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:00,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144045226] [2022-01-31 17:46:00,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144045226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:00,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:00,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:46:00,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236687406] [2022-01-31 17:46:00,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:00,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:46:00,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:46:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:46:00,378 INFO L87 Difference]: Start difference. First operand 520 states and 528 transitions. Second operand has 65 states, 65 states have (on average 1.4) internal successors, (91), 64 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:02,319 INFO L93 Difference]: Finished difference Result 980 states and 1003 transitions. [2022-01-31 17:46:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:46:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.4) internal successors, (91), 64 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 515 [2022-01-31 17:46:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:02,321 INFO L225 Difference]: With dead ends: 980 [2022-01-31 17:46:02,321 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 17:46:02,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:46:02,323 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 2456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2456 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:02,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2456 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:02,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 17:46:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2022-01-31 17:46:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 522 states have (on average 1.0172413793103448) internal successors, (531), 522 states have internal predecessors, (531), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 536 transitions. [2022-01-31 17:46:02,333 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 536 transitions. Word has length 515 [2022-01-31 17:46:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:02,334 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 536 transitions. [2022-01-31 17:46:02,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.4) internal successors, (91), 64 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 536 transitions. [2022-01-31 17:46:02,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-01-31 17:46:02,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:02,337 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:02,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:46:02,337 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:02,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:02,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2107010517, now seen corresponding path program 62 times [2022-01-31 17:46:02,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:02,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928178123] [2022-01-31 17:46:02,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:02,338 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:02,338 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:02,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:02,356 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:03,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:03,899 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:03,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928178123] [2022-01-31 17:46:03,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928178123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:03,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:03,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:46:03,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587081460] [2022-01-31 17:46:03,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:03,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:46:03,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:03,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:46:03,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:46:03,901 INFO L87 Difference]: Start difference. First operand 528 states and 536 transitions. Second operand has 66 states, 66 states have (on average 1.393939393939394) internal successors, (92), 65 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:06,520 INFO L93 Difference]: Finished difference Result 995 states and 1018 transitions. [2022-01-31 17:46:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:46:06,520 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.393939393939394) internal successors, (92), 65 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 523 [2022-01-31 17:46:06,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:06,521 INFO L225 Difference]: With dead ends: 995 [2022-01-31 17:46:06,522 INFO L226 Difference]: Without dead ends: 536 [2022-01-31 17:46:06,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:46:06,523 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 2155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2155 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:06,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2155 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:46:06,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-31 17:46:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-01-31 17:46:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 530 states have (on average 1.0169811320754718) internal successors, (539), 530 states have internal predecessors, (539), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 544 transitions. [2022-01-31 17:46:06,533 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 544 transitions. Word has length 523 [2022-01-31 17:46:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:06,533 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 544 transitions. [2022-01-31 17:46:06,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.393939393939394) internal successors, (92), 65 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 544 transitions. [2022-01-31 17:46:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-31 17:46:06,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:06,535 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:06,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:46:06,535 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:06,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1393306969, now seen corresponding path program 63 times [2022-01-31 17:46:06,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:06,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580900695] [2022-01-31 17:46:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:06,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:06,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:06,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:06,551 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:08,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:08,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:08,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580900695] [2022-01-31 17:46:08,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1580900695] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:08,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:08,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:46:08,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158511572] [2022-01-31 17:46:08,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:08,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:46:08,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:08,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:46:08,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:46:08,126 INFO L87 Difference]: Start difference. First operand 536 states and 544 transitions. Second operand has 67 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 66 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:10,020 INFO L93 Difference]: Finished difference Result 1010 states and 1033 transitions. [2022-01-31 17:46:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:46:10,020 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 66 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 531 [2022-01-31 17:46:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:10,022 INFO L225 Difference]: With dead ends: 1010 [2022-01-31 17:46:10,022 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 17:46:10,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:46:10,024 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 2171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2171 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:10,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2171 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:46:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 17:46:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2022-01-31 17:46:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 538 states have (on average 1.016728624535316) internal successors, (547), 538 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 17:46:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 552 transitions. [2022-01-31 17:46:10,034 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 552 transitions. Word has length 531 [2022-01-31 17:46:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:10,034 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 552 transitions. [2022-01-31 17:46:10,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 66 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 552 transitions. [2022-01-31 17:46:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-01-31 17:46:10,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:10,037 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:10,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:46:10,037 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:10,037 INFO L85 PathProgramCache]: Analyzing trace with hash 609653931, now seen corresponding path program 64 times [2022-01-31 17:46:10,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:10,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566875924] [2022-01-31 17:46:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:10,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:10,038 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:10,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:10,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:11,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:11,544 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:11,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566875924] [2022-01-31 17:46:11,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566875924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:11,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:11,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:46:11,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171922078] [2022-01-31 17:46:11,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:11,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:46:11,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:46:11,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:46:11,546 INFO L87 Difference]: Start difference. First operand 544 states and 552 transitions. Second operand has 68 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 67 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:13,550 INFO L93 Difference]: Finished difference Result 1025 states and 1048 transitions. [2022-01-31 17:46:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:46:13,550 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 67 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 539 [2022-01-31 17:46:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:13,552 INFO L225 Difference]: With dead ends: 1025 [2022-01-31 17:46:13,552 INFO L226 Difference]: Without dead ends: 552 [2022-01-31 17:46:13,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:46:13,553 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 1917 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1917 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:13,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1917 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-31 17:46:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-01-31 17:46:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 546 states have (on average 1.0164835164835164) internal successors, (555), 546 states have internal predecessors, (555), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 560 transitions. [2022-01-31 17:46:13,563 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 560 transitions. Word has length 539 [2022-01-31 17:46:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:13,563 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 560 transitions. [2022-01-31 17:46:13,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 67 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 560 transitions. [2022-01-31 17:46:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-01-31 17:46:13,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:13,565 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:13,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:46:13,566 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:13,566 INFO L85 PathProgramCache]: Analyzing trace with hash -286668505, now seen corresponding path program 65 times [2022-01-31 17:46:13,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:13,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044280990] [2022-01-31 17:46:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:13,567 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:13,567 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:13,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:13,582 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:15,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:15,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:15,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044280990] [2022-01-31 17:46:15,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044280990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:15,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:15,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:46:15,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412210869] [2022-01-31 17:46:15,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:15,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:46:15,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:15,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:46:15,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:46:15,206 INFO L87 Difference]: Start difference. First operand 552 states and 560 transitions. Second operand has 69 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 68 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:18,062 INFO L93 Difference]: Finished difference Result 1040 states and 1063 transitions. [2022-01-31 17:46:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:46:18,062 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 68 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 547 [2022-01-31 17:46:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:18,063 INFO L225 Difference]: With dead ends: 1040 [2022-01-31 17:46:18,063 INFO L226 Difference]: Without dead ends: 560 [2022-01-31 17:46:18,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:46:18,065 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 2297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2297 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:18,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2297 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:46:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-31 17:46:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2022-01-31 17:46:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 554 states have (on average 1.016245487364621) internal successors, (563), 554 states have internal predecessors, (563), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 568 transitions. [2022-01-31 17:46:18,074 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 568 transitions. Word has length 547 [2022-01-31 17:46:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:18,075 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 568 transitions. [2022-01-31 17:46:18,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 68 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 568 transitions. [2022-01-31 17:46:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-01-31 17:46:18,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:18,077 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:18,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:46:18,077 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:18,078 INFO L85 PathProgramCache]: Analyzing trace with hash -481691861, now seen corresponding path program 66 times [2022-01-31 17:46:18,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:18,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222003516] [2022-01-31 17:46:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:18,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:18,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:18,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:18,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:19,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:19,471 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222003516] [2022-01-31 17:46:19,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [222003516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:19,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:19,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:46:19,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125065349] [2022-01-31 17:46:19,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:19,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:46:19,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:19,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:46:19,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:46:19,472 INFO L87 Difference]: Start difference. First operand 560 states and 568 transitions. Second operand has 70 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 69 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:21,463 INFO L93 Difference]: Finished difference Result 1055 states and 1078 transitions. [2022-01-31 17:46:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:46:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 69 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 555 [2022-01-31 17:46:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:21,465 INFO L225 Difference]: With dead ends: 1055 [2022-01-31 17:46:21,465 INFO L226 Difference]: Without dead ends: 568 [2022-01-31 17:46:21,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:46:21,493 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 2548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2548 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:21,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 3170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2548 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-31 17:46:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2022-01-31 17:46:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 562 states have (on average 1.0160142348754448) internal successors, (571), 562 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 17:46:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 576 transitions. [2022-01-31 17:46:21,503 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 576 transitions. Word has length 555 [2022-01-31 17:46:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:21,503 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 576 transitions. [2022-01-31 17:46:21,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 69 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:21,503 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 576 transitions. [2022-01-31 17:46:21,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2022-01-31 17:46:21,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:21,505 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:21,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:46:21,506 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:21,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:21,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1553145945, now seen corresponding path program 67 times [2022-01-31 17:46:21,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:21,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600310249] [2022-01-31 17:46:21,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:21,508 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:21,508 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:21,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:21,523 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:22,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:22,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:22,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600310249] [2022-01-31 17:46:22,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [600310249] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:22,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:22,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:46:22,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917658189] [2022-01-31 17:46:22,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:22,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:46:22,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:22,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:46:22,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:46:22,656 INFO L87 Difference]: Start difference. First operand 568 states and 576 transitions. Second operand has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 70 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:24,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:24,739 INFO L93 Difference]: Finished difference Result 1070 states and 1093 transitions. [2022-01-31 17:46:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:46:24,739 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 70 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 563 [2022-01-31 17:46:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:24,740 INFO L225 Difference]: With dead ends: 1070 [2022-01-31 17:46:24,740 INFO L226 Difference]: Without dead ends: 576 [2022-01-31 17:46:24,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:46:24,742 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 2189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2189 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:24,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2189 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-31 17:46:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2022-01-31 17:46:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 570 states have (on average 1.0157894736842106) internal successors, (579), 570 states have internal predecessors, (579), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 584 transitions. [2022-01-31 17:46:24,751 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 584 transitions. Word has length 563 [2022-01-31 17:46:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:24,751 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 584 transitions. [2022-01-31 17:46:24,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 70 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 584 transitions. [2022-01-31 17:46:24,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2022-01-31 17:46:24,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:24,754 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:24,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:46:24,754 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:24,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash 404994475, now seen corresponding path program 68 times [2022-01-31 17:46:24,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:24,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93477346] [2022-01-31 17:46:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:24,756 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:24,756 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:24,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:24,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:26,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:26,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:26,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93477346] [2022-01-31 17:46:26,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [93477346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:26,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:26,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:46:26,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952541716] [2022-01-31 17:46:26,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:26,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:46:26,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:26,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:46:26,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:46:26,230 INFO L87 Difference]: Start difference. First operand 576 states and 584 transitions. Second operand has 72 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 71 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:28,749 INFO L93 Difference]: Finished difference Result 1085 states and 1108 transitions. [2022-01-31 17:46:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:46:28,749 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 71 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 571 [2022-01-31 17:46:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:28,751 INFO L225 Difference]: With dead ends: 1085 [2022-01-31 17:46:28,751 INFO L226 Difference]: Without dead ends: 584 [2022-01-31 17:46:28,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:46:28,755 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 2264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2264 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:28,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 2940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2264 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-31 17:46:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2022-01-31 17:46:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 578 states have (on average 1.0155709342560553) internal successors, (587), 578 states have internal predecessors, (587), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 592 transitions. [2022-01-31 17:46:28,769 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 592 transitions. Word has length 571 [2022-01-31 17:46:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:28,769 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 592 transitions. [2022-01-31 17:46:28,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 71 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 592 transitions. [2022-01-31 17:46:28,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-01-31 17:46:28,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:28,772 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:28,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:46:28,773 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:28,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:28,773 INFO L85 PathProgramCache]: Analyzing trace with hash 740103719, now seen corresponding path program 69 times [2022-01-31 17:46:28,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:28,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784572445] [2022-01-31 17:46:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:28,782 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:28,782 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:28,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:28,826 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:30,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:30,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784572445] [2022-01-31 17:46:30,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784572445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:30,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:30,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:46:30,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898564998] [2022-01-31 17:46:30,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:30,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:46:30,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:30,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:46:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:46:30,710 INFO L87 Difference]: Start difference. First operand 584 states and 592 transitions. Second operand has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 72 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:33,350 INFO L93 Difference]: Finished difference Result 1100 states and 1123 transitions. [2022-01-31 17:46:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:46:33,351 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 72 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 579 [2022-01-31 17:46:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:33,352 INFO L225 Difference]: With dead ends: 1100 [2022-01-31 17:46:33,352 INFO L226 Difference]: Without dead ends: 592 [2022-01-31 17:46:33,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:46:33,353 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 2392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2392 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:33,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 3019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2392 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-31 17:46:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2022-01-31 17:46:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 586 states have (on average 1.015358361774744) internal successors, (595), 586 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 17:46:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 600 transitions. [2022-01-31 17:46:33,364 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 600 transitions. Word has length 579 [2022-01-31 17:46:33,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:33,364 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 600 transitions. [2022-01-31 17:46:33,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 72 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 600 transitions. [2022-01-31 17:46:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-01-31 17:46:33,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:33,366 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:33,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:46:33,367 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:33,367 INFO L85 PathProgramCache]: Analyzing trace with hash 499375147, now seen corresponding path program 70 times [2022-01-31 17:46:33,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:33,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825515243] [2022-01-31 17:46:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:33,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:33,368 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:33,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:33,387 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:34,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:34,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:34,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825515243] [2022-01-31 17:46:34,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825515243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:34,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:34,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:46:34,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235185543] [2022-01-31 17:46:34,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:34,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:46:34,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:34,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:46:34,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:46:34,633 INFO L87 Difference]: Start difference. First operand 592 states and 600 transitions. Second operand has 74 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 73 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:37,156 INFO L93 Difference]: Finished difference Result 1115 states and 1138 transitions. [2022-01-31 17:46:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:46:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 73 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 587 [2022-01-31 17:46:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:37,157 INFO L225 Difference]: With dead ends: 1115 [2022-01-31 17:46:37,157 INFO L226 Difference]: Without dead ends: 600 [2022-01-31 17:46:37,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:46:37,159 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 2393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2393 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:37,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 3085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2393 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-31 17:46:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2022-01-31 17:46:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 594 states have (on average 1.0151515151515151) internal successors, (603), 594 states have internal predecessors, (603), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 608 transitions. [2022-01-31 17:46:37,169 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 608 transitions. Word has length 587 [2022-01-31 17:46:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:37,170 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 608 transitions. [2022-01-31 17:46:37,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 73 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 608 transitions. [2022-01-31 17:46:37,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2022-01-31 17:46:37,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:37,173 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:37,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:46:37,173 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:37,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash 144338087, now seen corresponding path program 71 times [2022-01-31 17:46:37,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:37,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678295055] [2022-01-31 17:46:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:37,174 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:37,174 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:37,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:37,195 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:39,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:39,115 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:39,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678295055] [2022-01-31 17:46:39,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678295055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:39,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:39,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:46:39,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248160738] [2022-01-31 17:46:39,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:39,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:46:39,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:46:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:46:39,117 INFO L87 Difference]: Start difference. First operand 600 states and 608 transitions. Second operand has 75 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 74 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:42,491 INFO L93 Difference]: Finished difference Result 1130 states and 1153 transitions. [2022-01-31 17:46:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:46:42,491 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 74 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 595 [2022-01-31 17:46:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:42,492 INFO L225 Difference]: With dead ends: 1130 [2022-01-31 17:46:42,493 INFO L226 Difference]: Without dead ends: 608 [2022-01-31 17:46:42,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:46:42,494 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 2743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2743 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:42,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2743 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:46:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-31 17:46:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2022-01-31 17:46:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 602 states have (on average 1.0149501661129567) internal successors, (611), 602 states have internal predecessors, (611), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 616 transitions. [2022-01-31 17:46:42,505 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 616 transitions. Word has length 595 [2022-01-31 17:46:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:42,505 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 616 transitions. [2022-01-31 17:46:42,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 74 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 616 transitions. [2022-01-31 17:46:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2022-01-31 17:46:42,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:42,508 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:42,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:46:42,509 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:42,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1359634091, now seen corresponding path program 72 times [2022-01-31 17:46:42,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:42,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991132085] [2022-01-31 17:46:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:42,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:42,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:42,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:42,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:44,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:44,523 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:44,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991132085] [2022-01-31 17:46:44,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991132085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:44,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:44,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:46:44,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181385114] [2022-01-31 17:46:44,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:44,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:46:44,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:44,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:46:44,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:46:44,525 INFO L87 Difference]: Start difference. First operand 608 states and 616 transitions. Second operand has 76 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 75 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:48,003 INFO L93 Difference]: Finished difference Result 1145 states and 1168 transitions. [2022-01-31 17:46:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:46:48,004 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 75 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 603 [2022-01-31 17:46:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:48,007 INFO L225 Difference]: With dead ends: 1145 [2022-01-31 17:46:48,007 INFO L226 Difference]: Without dead ends: 616 [2022-01-31 17:46:48,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:46:48,008 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 2613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2613 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:48,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 3321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2613 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:46:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-31 17:46:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-01-31 17:46:48,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 610 states have (on average 1.0147540983606558) internal successors, (619), 610 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 17:46:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 624 transitions. [2022-01-31 17:46:48,019 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 624 transitions. Word has length 603 [2022-01-31 17:46:48,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:48,019 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 624 transitions. [2022-01-31 17:46:48,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 75 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 624 transitions. [2022-01-31 17:46:48,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-01-31 17:46:48,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:48,022 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:48,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:46:48,022 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:48,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash -695934169, now seen corresponding path program 73 times [2022-01-31 17:46:48,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:48,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545323375] [2022-01-31 17:46:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:48,024 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:48,024 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:48,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:48,046 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:50,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:50,190 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:50,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545323375] [2022-01-31 17:46:50,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1545323375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:50,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:50,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:46:50,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63263643] [2022-01-31 17:46:50,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:50,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:46:50,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:46:50,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:46:50,192 INFO L87 Difference]: Start difference. First operand 616 states and 624 transitions. Second operand has 77 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 76 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:52,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:52,688 INFO L93 Difference]: Finished difference Result 1160 states and 1183 transitions. [2022-01-31 17:46:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:46:52,688 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 76 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 611 [2022-01-31 17:46:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:52,690 INFO L225 Difference]: With dead ends: 1160 [2022-01-31 17:46:52,690 INFO L226 Difference]: Without dead ends: 624 [2022-01-31 17:46:52,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:46:52,691 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 2827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2827 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:52,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 3486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2827 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-31 17:46:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2022-01-31 17:46:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 618 states have (on average 1.0145631067961165) internal successors, (627), 618 states have internal predecessors, (627), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 632 transitions. [2022-01-31 17:46:52,702 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 632 transitions. Word has length 611 [2022-01-31 17:46:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:52,702 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 632 transitions. [2022-01-31 17:46:52,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 76 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 632 transitions. [2022-01-31 17:46:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2022-01-31 17:46:52,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:52,705 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:52,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:46:52,705 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:52,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:52,706 INFO L85 PathProgramCache]: Analyzing trace with hash 282542379, now seen corresponding path program 74 times [2022-01-31 17:46:52,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:52,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328898060] [2022-01-31 17:46:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:52,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:52,707 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:52,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:52,728 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:54,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:54,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:54,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328898060] [2022-01-31 17:46:54,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [328898060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:54,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:54,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:46:54,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316008133] [2022-01-31 17:46:54,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:54,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:46:54,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:46:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:46:54,027 INFO L87 Difference]: Start difference. First operand 624 states and 632 transitions. Second operand has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 77 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:56,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:56,570 INFO L93 Difference]: Finished difference Result 1175 states and 1198 transitions. [2022-01-31 17:46:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:46:56,571 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 77 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 619 [2022-01-31 17:46:56,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:56,572 INFO L225 Difference]: With dead ends: 1175 [2022-01-31 17:46:56,572 INFO L226 Difference]: Without dead ends: 632 [2022-01-31 17:46:56,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:46:56,575 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 2454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2454 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:56,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2454 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-01-31 17:46:56,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2022-01-31 17:46:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 626 states have (on average 1.0143769968051117) internal successors, (635), 626 states have internal predecessors, (635), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 640 transitions. [2022-01-31 17:46:56,588 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 640 transitions. Word has length 619 [2022-01-31 17:46:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:56,588 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 640 transitions. [2022-01-31 17:46:56,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 77 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 640 transitions. [2022-01-31 17:46:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2022-01-31 17:46:56,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:56,591 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:56,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:46:56,591 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1367112103, now seen corresponding path program 75 times [2022-01-31 17:46:56,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:56,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721903494] [2022-01-31 17:46:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:56,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:56,593 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:56,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:56,614 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:57,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:57,988 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 17:46:57,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:57,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721903494] [2022-01-31 17:46:57,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [721903494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:57,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:57,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:46:57,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932108728] [2022-01-31 17:46:57,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:57,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:46:57,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:46:57,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:46:57,990 INFO L87 Difference]: Start difference. First operand 632 states and 640 transitions. Second operand has 79 states, 79 states have (on average 1.3291139240506329) internal successors, (105), 78 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:00,837 INFO L93 Difference]: Finished difference Result 1190 states and 1213 transitions. [2022-01-31 17:47:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:47:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.3291139240506329) internal successors, (105), 78 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 627 [2022-01-31 17:47:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:00,839 INFO L225 Difference]: With dead ends: 1190 [2022-01-31 17:47:00,839 INFO L226 Difference]: Without dead ends: 640 [2022-01-31 17:47:00,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:47:00,841 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 2861 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2861 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:00,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 3517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2861 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:47:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-31 17:47:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2022-01-31 17:47:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 634 states have (on average 1.0141955835962144) internal successors, (643), 634 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 17:47:00,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 648 transitions. [2022-01-31 17:47:00,852 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 648 transitions. Word has length 627 [2022-01-31 17:47:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:00,852 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 648 transitions. [2022-01-31 17:47:00,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.3291139240506329) internal successors, (105), 78 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 648 transitions. [2022-01-31 17:47:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2022-01-31 17:47:00,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:00,855 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:00,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:47:00,855 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:00,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:00,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1106607189, now seen corresponding path program 76 times [2022-01-31 17:47:00,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:00,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284830841] [2022-01-31 17:47:00,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:00,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:00,857 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:00,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:00,879 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:03,046 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:03,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284830841] [2022-01-31 17:47:03,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [284830841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:03,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:03,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:47:03,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871058467] [2022-01-31 17:47:03,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:03,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:47:03,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:03,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:47:03,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:47:03,048 INFO L87 Difference]: Start difference. First operand 640 states and 648 transitions. Second operand has 80 states, 80 states have (on average 1.325) internal successors, (106), 79 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:06,952 INFO L93 Difference]: Finished difference Result 1205 states and 1228 transitions. [2022-01-31 17:47:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:47:06,953 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.325) internal successors, (106), 79 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 635 [2022-01-31 17:47:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:06,954 INFO L225 Difference]: With dead ends: 1205 [2022-01-31 17:47:06,954 INFO L226 Difference]: Without dead ends: 648 [2022-01-31 17:47:06,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:47:06,956 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 2961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2961 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:06,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 3663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2961 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:47:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-31 17:47:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2022-01-31 17:47:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 642 states have (on average 1.014018691588785) internal successors, (651), 642 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 656 transitions. [2022-01-31 17:47:06,967 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 656 transitions. Word has length 635 [2022-01-31 17:47:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:06,967 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 656 transitions. [2022-01-31 17:47:06,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.325) internal successors, (106), 79 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 656 transitions. [2022-01-31 17:47:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2022-01-31 17:47:06,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:06,970 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:06,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:47:06,970 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1394683943, now seen corresponding path program 77 times [2022-01-31 17:47:06,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:06,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890571495] [2022-01-31 17:47:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:06,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:06,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:06,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:06,992 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:09,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:09,149 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:09,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890571495] [2022-01-31 17:47:09,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [890571495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:09,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:09,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:47:09,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998390325] [2022-01-31 17:47:09,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:09,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:47:09,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:09,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:47:09,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:47:09,151 INFO L87 Difference]: Start difference. First operand 648 states and 656 transitions. Second operand has 81 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 80 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:13,065 INFO L93 Difference]: Finished difference Result 1220 states and 1243 transitions. [2022-01-31 17:47:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:47:13,065 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 80 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 643 [2022-01-31 17:47:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:13,067 INFO L225 Difference]: With dead ends: 1220 [2022-01-31 17:47:13,067 INFO L226 Difference]: Without dead ends: 656 [2022-01-31 17:47:13,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:47:13,070 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 2533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2533 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:13,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2533 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:47:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-31 17:47:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 656. [2022-01-31 17:47:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 650 states have (on average 1.0138461538461538) internal successors, (659), 650 states have internal predecessors, (659), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 664 transitions. [2022-01-31 17:47:13,087 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 664 transitions. Word has length 643 [2022-01-31 17:47:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:13,087 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 664 transitions. [2022-01-31 17:47:13,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 80 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 664 transitions. [2022-01-31 17:47:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-01-31 17:47:13,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:13,090 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:13,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:47:13,090 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:13,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:13,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1148967381, now seen corresponding path program 78 times [2022-01-31 17:47:13,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:13,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496396125] [2022-01-31 17:47:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:13,092 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:13,092 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:13,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:13,114 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:15,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:15,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:15,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496396125] [2022-01-31 17:47:15,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [496396125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:15,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:15,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:47:15,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728090850] [2022-01-31 17:47:15,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:15,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:47:15,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:15,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:47:15,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:47:15,247 INFO L87 Difference]: Start difference. First operand 656 states and 664 transitions. Second operand has 82 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 81 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:18,884 INFO L93 Difference]: Finished difference Result 1235 states and 1258 transitions. [2022-01-31 17:47:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:47:18,885 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 81 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 651 [2022-01-31 17:47:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:18,886 INFO L225 Difference]: With dead ends: 1235 [2022-01-31 17:47:18,886 INFO L226 Difference]: Without dead ends: 664 [2022-01-31 17:47:18,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:47:18,888 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 2684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2684 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:18,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 3421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2684 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:47:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-31 17:47:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2022-01-31 17:47:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 658 states have (on average 1.013677811550152) internal successors, (667), 658 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 17:47:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 672 transitions. [2022-01-31 17:47:18,899 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 672 transitions. Word has length 651 [2022-01-31 17:47:18,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:18,899 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 672 transitions. [2022-01-31 17:47:18,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 81 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:18,899 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 672 transitions. [2022-01-31 17:47:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2022-01-31 17:47:18,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:18,904 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:18,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:47:18,904 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:18,904 INFO L85 PathProgramCache]: Analyzing trace with hash -753727833, now seen corresponding path program 79 times [2022-01-31 17:47:18,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:18,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945705310] [2022-01-31 17:47:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:18,907 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:18,907 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:18,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:18,936 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:20,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:20,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:20,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945705310] [2022-01-31 17:47:20,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945705310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:20,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:20,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:47:20,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916681713] [2022-01-31 17:47:20,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:20,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:47:20,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:20,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:47:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:47:20,429 INFO L87 Difference]: Start difference. First operand 664 states and 672 transitions. Second operand has 83 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:23,420 INFO L93 Difference]: Finished difference Result 1250 states and 1273 transitions. [2022-01-31 17:47:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:47:23,420 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 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 659 [2022-01-31 17:47:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:23,422 INFO L225 Difference]: With dead ends: 1250 [2022-01-31 17:47:23,422 INFO L226 Difference]: Without dead ends: 672 [2022-01-31 17:47:23,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:47:23,423 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 3263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3263 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:23,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 3970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3263 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:47:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-31 17:47:23,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 672. [2022-01-31 17:47:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 666 states have (on average 1.0135135135135136) internal successors, (675), 666 states have internal predecessors, (675), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 680 transitions. [2022-01-31 17:47:23,435 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 680 transitions. Word has length 659 [2022-01-31 17:47:23,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:23,436 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 680 transitions. [2022-01-31 17:47:23,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 680 transitions. [2022-01-31 17:47:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2022-01-31 17:47:23,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:23,439 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:23,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:47:23,440 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1847863467, now seen corresponding path program 80 times [2022-01-31 17:47:23,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:23,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546917032] [2022-01-31 17:47:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:23,441 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:23,441 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:23,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:23,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:25,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:25,058 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:25,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546917032] [2022-01-31 17:47:25,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [546917032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:25,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:25,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:47:25,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927118378] [2022-01-31 17:47:25,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:25,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:47:25,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:47:25,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:47:25,060 INFO L87 Difference]: Start difference. First operand 672 states and 680 transitions. Second operand has 84 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 83 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:28,052 INFO L93 Difference]: Finished difference Result 1265 states and 1288 transitions. [2022-01-31 17:47:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:47:28,052 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 83 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 667 [2022-01-31 17:47:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:28,054 INFO L225 Difference]: With dead ends: 1265 [2022-01-31 17:47:28,054 INFO L226 Difference]: Without dead ends: 680 [2022-01-31 17:47:28,056 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 17:47:28,056 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 3482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 4197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3482 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:28,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 4197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3482 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:47:28,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-01-31 17:47:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 680. [2022-01-31 17:47:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 674 states have (on average 1.013353115727003) internal successors, (683), 674 states have internal predecessors, (683), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 688 transitions. [2022-01-31 17:47:28,068 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 688 transitions. Word has length 667 [2022-01-31 17:47:28,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:28,068 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 688 transitions. [2022-01-31 17:47:28,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 83 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 688 transitions. [2022-01-31 17:47:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2022-01-31 17:47:28,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:28,071 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:28,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:47:28,071 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash -420348633, now seen corresponding path program 81 times [2022-01-31 17:47:28,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:28,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411276219] [2022-01-31 17:47:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:28,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:28,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:28,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:28,104 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:29,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:29,727 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:29,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411276219] [2022-01-31 17:47:29,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1411276219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:29,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:29,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:47:29,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003226231] [2022-01-31 17:47:29,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:29,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:47:29,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:29,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:47:29,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:47:29,729 INFO L87 Difference]: Start difference. First operand 680 states and 688 transitions. Second operand has 85 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 84 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:32,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:32,884 INFO L93 Difference]: Finished difference Result 1280 states and 1303 transitions. [2022-01-31 17:47:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:47:32,885 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 84 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 675 [2022-01-31 17:47:32,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:32,899 INFO L225 Difference]: With dead ends: 1280 [2022-01-31 17:47:32,899 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 17:47:32,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:47:32,901 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 2403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2403 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:32,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 3202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2403 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:47:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 17:47:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 688. [2022-01-31 17:47:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 682 states have (on average 1.0131964809384164) internal successors, (691), 682 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 17:47:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 696 transitions. [2022-01-31 17:47:32,914 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 696 transitions. Word has length 675 [2022-01-31 17:47:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:32,914 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 696 transitions. [2022-01-31 17:47:32,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 84 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 696 transitions. [2022-01-31 17:47:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2022-01-31 17:47:32,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:32,918 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:32,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:47:32,919 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:32,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1019906859, now seen corresponding path program 82 times [2022-01-31 17:47:32,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:32,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123320157] [2022-01-31 17:47:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:32,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:32,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:32,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:32,955 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:34,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:34,590 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123320157] [2022-01-31 17:47:34,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [123320157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:34,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:34,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:47:34,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051109443] [2022-01-31 17:47:34,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:34,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:47:34,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:34,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:47:34,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:47:34,592 INFO L87 Difference]: Start difference. First operand 688 states and 696 transitions. Second operand has 86 states, 86 states have (on average 1.302325581395349) internal successors, (112), 85 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:37,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:37,974 INFO L93 Difference]: Finished difference Result 1295 states and 1318 transitions. [2022-01-31 17:47:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:47:37,975 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.302325581395349) internal successors, (112), 85 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 683 [2022-01-31 17:47:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:37,988 INFO L225 Difference]: With dead ends: 1295 [2022-01-31 17:47:37,988 INFO L226 Difference]: Without dead ends: 696 [2022-01-31 17:47:37,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:47:37,990 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 3271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 4078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3271 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:37,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 4078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3271 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:47:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-01-31 17:47:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 696. [2022-01-31 17:47:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 690 states have (on average 1.0130434782608695) internal successors, (699), 690 states have internal predecessors, (699), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 704 transitions. [2022-01-31 17:47:38,007 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 704 transitions. Word has length 683 [2022-01-31 17:47:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:38,007 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 704 transitions. [2022-01-31 17:47:38,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.302325581395349) internal successors, (112), 85 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 704 transitions. [2022-01-31 17:47:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2022-01-31 17:47:38,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:38,011 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:38,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:47:38,012 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1034021977, now seen corresponding path program 83 times [2022-01-31 17:47:38,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:38,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723428588] [2022-01-31 17:47:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:38,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:38,014 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:38,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:38,071 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:40,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:40,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723428588] [2022-01-31 17:47:40,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [723428588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:40,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:40,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:47:40,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670970002] [2022-01-31 17:47:40,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:40,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:47:40,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:40,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:47:40,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:47:40,511 INFO L87 Difference]: Start difference. First operand 696 states and 704 transitions. Second operand has 87 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 86 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:43,711 INFO L93 Difference]: Finished difference Result 1310 states and 1333 transitions. [2022-01-31 17:47:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:47:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 86 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 691 [2022-01-31 17:47:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:43,712 INFO L225 Difference]: With dead ends: 1310 [2022-01-31 17:47:43,712 INFO L226 Difference]: Without dead ends: 704 [2022-01-31 17:47:43,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:47:43,714 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 2797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2797 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:43,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2797 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:47:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-01-31 17:47:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 704. [2022-01-31 17:47:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 698 states have (on average 1.012893982808023) internal successors, (707), 698 states have internal predecessors, (707), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 712 transitions. [2022-01-31 17:47:43,756 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 712 transitions. Word has length 691 [2022-01-31 17:47:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:43,756 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 712 transitions. [2022-01-31 17:47:43,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 86 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:43,757 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 712 transitions. [2022-01-31 17:47:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2022-01-31 17:47:43,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:43,761 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:43,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:47:43,765 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:43,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1873326677, now seen corresponding path program 84 times [2022-01-31 17:47:43,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:43,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860039763] [2022-01-31 17:47:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:43,778 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:43,778 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:43,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:43,851 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:45,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:45,535 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:45,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860039763] [2022-01-31 17:47:45,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1860039763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:45,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:45,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:47:45,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390184170] [2022-01-31 17:47:45,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:45,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:47:45,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:45,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:47:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:47:45,539 INFO L87 Difference]: Start difference. First operand 704 states and 712 transitions. Second operand has 88 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 87 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:49,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:49,096 INFO L93 Difference]: Finished difference Result 1325 states and 1348 transitions. [2022-01-31 17:47:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:47:49,097 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 87 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 699 [2022-01-31 17:47:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:49,098 INFO L225 Difference]: With dead ends: 1325 [2022-01-31 17:47:49,098 INFO L226 Difference]: Without dead ends: 712 [2022-01-31 17:47:49,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:47:49,103 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 3880 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 4627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3880 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:49,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 4627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3880 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:47:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-31 17:47:49,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2022-01-31 17:47:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 706 states have (on average 1.0127478753541077) internal successors, (715), 706 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 17:47:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 720 transitions. [2022-01-31 17:47:49,120 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 720 transitions. Word has length 699 [2022-01-31 17:47:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:49,120 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 720 transitions. [2022-01-31 17:47:49,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 87 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 720 transitions. [2022-01-31 17:47:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-01-31 17:47:49,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:49,124 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:49,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:47:49,124 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1225307609, now seen corresponding path program 85 times [2022-01-31 17:47:49,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:49,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230262587] [2022-01-31 17:47:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:49,129 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:49,129 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:49,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:49,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:50,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:50,866 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:50,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230262587] [2022-01-31 17:47:50,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [230262587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:50,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:50,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:47:50,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657591349] [2022-01-31 17:47:50,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:50,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:47:50,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:50,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:47:50,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:47:50,868 INFO L87 Difference]: Start difference. First operand 712 states and 720 transitions. Second operand has 89 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 88 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:54,437 INFO L93 Difference]: Finished difference Result 1340 states and 1363 transitions. [2022-01-31 17:47:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:47:54,438 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 88 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 707 [2022-01-31 17:47:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:54,439 INFO L225 Difference]: With dead ends: 1340 [2022-01-31 17:47:54,439 INFO L226 Difference]: Without dead ends: 720 [2022-01-31 17:47:54,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:47:54,440 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 3132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3132 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:54,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 3906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3132 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:47:54,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-01-31 17:47:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2022-01-31 17:47:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 714 states have (on average 1.0126050420168067) internal successors, (723), 714 states have internal predecessors, (723), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 728 transitions. [2022-01-31 17:47:54,452 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 728 transitions. Word has length 707 [2022-01-31 17:47:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:54,452 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 728 transitions. [2022-01-31 17:47:54,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 88 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 728 transitions. [2022-01-31 17:47:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2022-01-31 17:47:54,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:54,456 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:54,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:47:54,456 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash -743804885, now seen corresponding path program 86 times [2022-01-31 17:47:54,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:54,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544485455] [2022-01-31 17:47:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:54,458 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:54,458 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:54,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:54,488 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:56,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:56,904 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544485455] [2022-01-31 17:47:56,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [544485455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:56,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:56,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:47:56,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59592948] [2022-01-31 17:47:56,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:56,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:47:56,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:47:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:47:56,906 INFO L87 Difference]: Start difference. First operand 720 states and 728 transitions. Second operand has 90 states, 90 states have (on average 1.288888888888889) internal successors, (116), 89 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:01,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:01,005 INFO L93 Difference]: Finished difference Result 1355 states and 1378 transitions. [2022-01-31 17:48:01,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:48:01,005 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.288888888888889) internal successors, (116), 89 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 715 [2022-01-31 17:48:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:01,018 INFO L225 Difference]: With dead ends: 1355 [2022-01-31 17:48:01,018 INFO L226 Difference]: Without dead ends: 728 [2022-01-31 17:48:01,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:48:01,020 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 3146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3146 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:01,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 3985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3146 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:48:01,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-01-31 17:48:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 728. [2022-01-31 17:48:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 722 states have (on average 1.0124653739612188) internal successors, (731), 722 states have internal predecessors, (731), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 736 transitions. [2022-01-31 17:48:01,032 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 736 transitions. Word has length 715 [2022-01-31 17:48:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:01,032 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 736 transitions. [2022-01-31 17:48:01,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.288888888888889) internal successors, (116), 89 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:01,032 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 736 transitions. [2022-01-31 17:48:01,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2022-01-31 17:48:01,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:01,036 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:01,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:48:01,036 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:01,036 INFO L85 PathProgramCache]: Analyzing trace with hash 878551207, now seen corresponding path program 87 times [2022-01-31 17:48:01,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:01,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221043537] [2022-01-31 17:48:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:01,037 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:01,037 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:01,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:01,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:03,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:03,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:03,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221043537] [2022-01-31 17:48:03,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1221043537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:03,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:03,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:48:03,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661001434] [2022-01-31 17:48:03,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:03,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:48:03,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:48:03,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:48:03,845 INFO L87 Difference]: Start difference. First operand 728 states and 736 transitions. Second operand has 91 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 90 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:08,949 INFO L93 Difference]: Finished difference Result 1370 states and 1393 transitions. [2022-01-31 17:48:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:48:08,949 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 90 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 723 [2022-01-31 17:48:08,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:08,950 INFO L225 Difference]: With dead ends: 1370 [2022-01-31 17:48:08,950 INFO L226 Difference]: Without dead ends: 736 [2022-01-31 17:48:08,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:48:08,952 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 2969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2969 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:08,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 3816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2969 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:48:08,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-01-31 17:48:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2022-01-31 17:48:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 730 states have (on average 1.0123287671232877) internal successors, (739), 730 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 17:48:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 744 transitions. [2022-01-31 17:48:08,964 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 744 transitions. Word has length 723 [2022-01-31 17:48:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:08,964 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 744 transitions. [2022-01-31 17:48:08,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 90 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 744 transitions. [2022-01-31 17:48:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2022-01-31 17:48:08,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:08,968 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:08,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:48:08,968 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:08,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1940124331, now seen corresponding path program 88 times [2022-01-31 17:48:08,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:08,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519442592] [2022-01-31 17:48:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:08,973 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:08,974 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:08,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:09,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:11,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:11,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:11,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519442592] [2022-01-31 17:48:11,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [519442592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:11,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:11,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:48:11,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982586560] [2022-01-31 17:48:11,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:11,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:48:11,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:11,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:48:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:48:11,836 INFO L87 Difference]: Start difference. First operand 736 states and 744 transitions. Second operand has 92 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:17,007 INFO L93 Difference]: Finished difference Result 1385 states and 1408 transitions. [2022-01-31 17:48:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:48:17,007 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 731 [2022-01-31 17:48:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:17,008 INFO L225 Difference]: With dead ends: 1385 [2022-01-31 17:48:17,008 INFO L226 Difference]: Without dead ends: 744 [2022-01-31 17:48:17,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:48:17,010 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 2951 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2951 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:17,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 3806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2951 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:48:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-01-31 17:48:17,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2022-01-31 17:48:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 738 states have (on average 1.0121951219512195) internal successors, (747), 738 states have internal predecessors, (747), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 752 transitions. [2022-01-31 17:48:17,022 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 752 transitions. Word has length 731 [2022-01-31 17:48:17,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:17,023 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 752 transitions. [2022-01-31 17:48:17,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:17,023 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 752 transitions. [2022-01-31 17:48:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2022-01-31 17:48:17,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:17,027 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:17,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:48:17,027 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:17,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:17,027 INFO L85 PathProgramCache]: Analyzing trace with hash -936306905, now seen corresponding path program 89 times [2022-01-31 17:48:17,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:17,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186969442] [2022-01-31 17:48:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:17,028 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:17,028 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:17,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:17,059 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:19,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:19,959 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:19,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186969442] [2022-01-31 17:48:19,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186969442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:19,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:19,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:48:19,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680881135] [2022-01-31 17:48:19,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:19,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:48:19,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:48:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:48:19,961 INFO L87 Difference]: Start difference. First operand 744 states and 752 transitions. Second operand has 93 states, 93 states have (on average 1.2795698924731183) internal successors, (119), 92 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:23,778 INFO L93 Difference]: Finished difference Result 1400 states and 1423 transitions. [2022-01-31 17:48:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:48:23,778 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2795698924731183) internal successors, (119), 92 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 739 [2022-01-31 17:48:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:23,779 INFO L225 Difference]: With dead ends: 1400 [2022-01-31 17:48:23,779 INFO L226 Difference]: Without dead ends: 752 [2022-01-31 17:48:23,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:48:23,781 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 3311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3311 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:23,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 4117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3311 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:48:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-01-31 17:48:23,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2022-01-31 17:48:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 746 states have (on average 1.0120643431635388) internal successors, (755), 746 states have internal predecessors, (755), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 760 transitions. [2022-01-31 17:48:23,797 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 760 transitions. Word has length 739 [2022-01-31 17:48:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:23,797 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 760 transitions. [2022-01-31 17:48:23,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2795698924731183) internal successors, (119), 92 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 760 transitions. [2022-01-31 17:48:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2022-01-31 17:48:23,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:23,801 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:23,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:48:23,801 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:23,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:23,802 INFO L85 PathProgramCache]: Analyzing trace with hash -551299797, now seen corresponding path program 90 times [2022-01-31 17:48:23,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:23,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257328898] [2022-01-31 17:48:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:23,803 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:23,803 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:23,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:23,838 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:25,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:25,834 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 17:48:25,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:25,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257328898] [2022-01-31 17:48:25,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257328898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:25,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:25,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:48:25,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539638997] [2022-01-31 17:48:25,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:25,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:48:25,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:48:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:48:25,837 INFO L87 Difference]: Start difference. First operand 752 states and 760 transitions. Second operand has 94 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 93 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:29,648 INFO L93 Difference]: Finished difference Result 1415 states and 1438 transitions. [2022-01-31 17:48:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:48:29,649 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 93 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 747 [2022-01-31 17:48:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:29,650 INFO L225 Difference]: With dead ends: 1415 [2022-01-31 17:48:29,650 INFO L226 Difference]: Without dead ends: 760 [2022-01-31 17:48:29,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:48:29,652 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 3002 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3002 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:29,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 3873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3002 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:48:29,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-31 17:48:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 760. [2022-01-31 17:48:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 754 states have (on average 1.0119363395225465) internal successors, (763), 754 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 17:48:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 768 transitions. [2022-01-31 17:48:29,665 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 768 transitions. Word has length 747 [2022-01-31 17:48:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:29,665 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 768 transitions. [2022-01-31 17:48:29,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 93 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 768 transitions. [2022-01-31 17:48:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2022-01-31 17:48:29,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:29,670 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:29,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:48:29,670 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:29,670 INFO L85 PathProgramCache]: Analyzing trace with hash 504475047, now seen corresponding path program 91 times [2022-01-31 17:48:29,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:29,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033197856] [2022-01-31 17:48:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:29,671 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:29,671 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:29,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:29,706 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:32,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:32,734 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:32,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033197856] [2022-01-31 17:48:32,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2033197856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:32,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:32,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:48:32,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269586529] [2022-01-31 17:48:32,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:32,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:48:32,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:48:32,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:48:32,737 INFO L87 Difference]: Start difference. First operand 760 states and 768 transitions. Second operand has 95 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 94 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:37,784 INFO L93 Difference]: Finished difference Result 1430 states and 1453 transitions. [2022-01-31 17:48:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:48:37,784 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 94 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 755 [2022-01-31 17:48:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:37,785 INFO L225 Difference]: With dead ends: 1430 [2022-01-31 17:48:37,785 INFO L226 Difference]: Without dead ends: 768 [2022-01-31 17:48:37,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:48:37,787 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 3360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3360 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:37,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 4182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3360 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:48:37,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-01-31 17:48:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 768. [2022-01-31 17:48:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 762 states have (on average 1.0118110236220472) internal successors, (771), 762 states have internal predecessors, (771), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 776 transitions. [2022-01-31 17:48:37,799 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 776 transitions. Word has length 755 [2022-01-31 17:48:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:37,799 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 776 transitions. [2022-01-31 17:48:37,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 94 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 776 transitions. [2022-01-31 17:48:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 764 [2022-01-31 17:48:37,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:37,804 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:37,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:48:37,804 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2029381717, now seen corresponding path program 92 times [2022-01-31 17:48:37,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:37,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508028910] [2022-01-31 17:48:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:37,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:37,808 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:37,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:37,842 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:39,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:39,838 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 17:48:39,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:39,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508028910] [2022-01-31 17:48:39,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [508028910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:39,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:39,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:48:39,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483899219] [2022-01-31 17:48:39,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:39,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:48:39,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:39,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:48:39,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:48:39,839 INFO L87 Difference]: Start difference. First operand 768 states and 776 transitions. Second operand has 96 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 95 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:43,823 INFO L93 Difference]: Finished difference Result 1445 states and 1468 transitions. [2022-01-31 17:48:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:48:43,823 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 95 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 763 [2022-01-31 17:48:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:43,824 INFO L225 Difference]: With dead ends: 1445 [2022-01-31 17:48:43,824 INFO L226 Difference]: Without dead ends: 776 [2022-01-31 17:48:43,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:48:43,826 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 2981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2981 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:43,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2981 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:48:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-01-31 17:48:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-01-31 17:48:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 770 states have (on average 1.0116883116883117) internal successors, (779), 770 states have internal predecessors, (779), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:43,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 784 transitions. [2022-01-31 17:48:43,864 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 784 transitions. Word has length 763 [2022-01-31 17:48:43,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:43,865 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 784 transitions. [2022-01-31 17:48:43,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 95 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 784 transitions. [2022-01-31 17:48:43,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-01-31 17:48:43,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:43,869 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:43,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:48:43,869 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:43,869 INFO L85 PathProgramCache]: Analyzing trace with hash -6331353, now seen corresponding path program 93 times [2022-01-31 17:48:43,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:43,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970807748] [2022-01-31 17:48:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:43,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:43,871 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:43,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:43,905 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:46,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:46,519 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 17:48:46,519 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:46,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970807748] [2022-01-31 17:48:46,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1970807748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:46,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:46,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:48:46,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424368016] [2022-01-31 17:48:46,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:46,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:48:46,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:48:46,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:48:46,522 INFO L87 Difference]: Start difference. First operand 776 states and 784 transitions. Second operand has 97 states, 97 states have (on average 1.268041237113402) internal successors, (123), 96 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:52,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:52,369 INFO L93 Difference]: Finished difference Result 1460 states and 1483 transitions. [2022-01-31 17:48:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:48:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.268041237113402) internal successors, (123), 96 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 771 [2022-01-31 17:48:52,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:52,370 INFO L225 Difference]: With dead ends: 1460 [2022-01-31 17:48:52,370 INFO L226 Difference]: Without dead ends: 784 [2022-01-31 17:48:52,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:48:52,372 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 3377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 4196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3377 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:52,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 4196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3377 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:48:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-01-31 17:48:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2022-01-31 17:48:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 778 states have (on average 1.0115681233933163) internal successors, (787), 778 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 17:48:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 792 transitions. [2022-01-31 17:48:52,385 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 792 transitions. Word has length 771 [2022-01-31 17:48:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:52,386 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 792 transitions. [2022-01-31 17:48:52,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.268041237113402) internal successors, (123), 96 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:52,386 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 792 transitions. [2022-01-31 17:48:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2022-01-31 17:48:52,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:52,390 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:52,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:48:52,390 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:52,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:52,391 INFO L85 PathProgramCache]: Analyzing trace with hash -566838741, now seen corresponding path program 94 times [2022-01-31 17:48:52,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:52,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000586820] [2022-01-31 17:48:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:52,392 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:52,392 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:52,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:52,430 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:55,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:55,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:55,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000586820] [2022-01-31 17:48:55,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000586820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:55,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:55,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:48:55,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116514972] [2022-01-31 17:48:55,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:55,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:48:55,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:55,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:48:55,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:48:55,511 INFO L87 Difference]: Start difference. First operand 784 states and 792 transitions. Second operand has 98 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 97 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:01,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:01,084 INFO L93 Difference]: Finished difference Result 1475 states and 1498 transitions. [2022-01-31 17:49:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:49:01,085 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 97 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 779 [2022-01-31 17:49:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:01,086 INFO L225 Difference]: With dead ends: 1475 [2022-01-31 17:49:01,086 INFO L226 Difference]: Without dead ends: 792 [2022-01-31 17:49:01,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:49:01,088 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 3082 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 4023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3082 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:01,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 78 Invalid, 4023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3082 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:49:01,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-31 17:49:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 792. [2022-01-31 17:49:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 786 states have (on average 1.0114503816793894) internal successors, (795), 786 states have internal predecessors, (795), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 800 transitions. [2022-01-31 17:49:01,101 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 800 transitions. Word has length 779 [2022-01-31 17:49:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:01,101 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 800 transitions. [2022-01-31 17:49:01,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 97 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 800 transitions. [2022-01-31 17:49:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2022-01-31 17:49:01,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:01,106 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:01,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:49:01,106 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:01,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1417296551, now seen corresponding path program 95 times [2022-01-31 17:49:01,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:01,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176086774] [2022-01-31 17:49:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:01,107 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:01,107 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:01,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:01,149 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:04,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:04,430 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176086774] [2022-01-31 17:49:04,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [176086774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:04,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:04,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:49:04,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913895794] [2022-01-31 17:49:04,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:04,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:49:04,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:49:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:49:04,432 INFO L87 Difference]: Start difference. First operand 792 states and 800 transitions. Second operand has 99 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 98 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:09,387 INFO L93 Difference]: Finished difference Result 1490 states and 1513 transitions. [2022-01-31 17:49:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:49:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 98 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 787 [2022-01-31 17:49:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:09,396 INFO L225 Difference]: With dead ends: 1490 [2022-01-31 17:49:09,396 INFO L226 Difference]: Without dead ends: 800 [2022-01-31 17:49:09,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:49:09,398 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 3424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 4316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3424 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:09,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 4316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3424 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:49:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-01-31 17:49:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 800. [2022-01-31 17:49:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 794 states have (on average 1.0113350125944585) internal successors, (803), 794 states have internal predecessors, (803), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 808 transitions. [2022-01-31 17:49:09,412 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 808 transitions. Word has length 787 [2022-01-31 17:49:09,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:09,412 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 808 transitions. [2022-01-31 17:49:09,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 98 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 808 transitions. [2022-01-31 17:49:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-01-31 17:49:09,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:09,417 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:09,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:49:09,417 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:09,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1502198955, now seen corresponding path program 96 times [2022-01-31 17:49:09,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:09,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504440356] [2022-01-31 17:49:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:09,420 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:09,420 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:09,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:09,454 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:11,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:11,757 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:11,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504440356] [2022-01-31 17:49:11,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [504440356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:11,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:11,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:49:11,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270168412] [2022-01-31 17:49:11,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:11,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:49:11,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:49:11,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:49:11,759 INFO L87 Difference]: Start difference. First operand 800 states and 808 transitions. Second operand has 100 states, 100 states have (on average 1.26) internal successors, (126), 99 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:16,681 INFO L93 Difference]: Finished difference Result 1505 states and 1528 transitions. [2022-01-31 17:49:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:49:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.26) internal successors, (126), 99 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 795 [2022-01-31 17:49:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:16,683 INFO L225 Difference]: With dead ends: 1505 [2022-01-31 17:49:16,683 INFO L226 Difference]: Without dead ends: 808 [2022-01-31 17:49:16,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:49:16,685 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 3235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 4154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3235 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:16,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 4154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3235 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:49:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-31 17:49:16,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2022-01-31 17:49:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 802 states have (on average 1.0112219451371571) internal successors, (811), 802 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 17:49:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 816 transitions. [2022-01-31 17:49:16,698 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 816 transitions. Word has length 795 [2022-01-31 17:49:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:16,698 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 816 transitions. [2022-01-31 17:49:16,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.26) internal successors, (126), 99 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 816 transitions. [2022-01-31 17:49:16,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 804 [2022-01-31 17:49:16,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:16,703 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:16,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:49:16,703 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:16,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:16,703 INFO L85 PathProgramCache]: Analyzing trace with hash 574763303, now seen corresponding path program 97 times [2022-01-31 17:49:16,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:16,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425501017] [2022-01-31 17:49:16,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:16,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:16,705 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:16,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:16,747 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:19,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:19,603 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:19,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425501017] [2022-01-31 17:49:19,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [425501017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:19,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:19,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:49:19,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158703392] [2022-01-31 17:49:19,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:19,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:49:19,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:19,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:49:19,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:49:19,605 INFO L87 Difference]: Start difference. First operand 808 states and 816 transitions. Second operand has 101 states, 101 states have (on average 1.2574257425742574) internal successors, (127), 100 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:24,850 INFO L93 Difference]: Finished difference Result 1520 states and 1543 transitions. [2022-01-31 17:49:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:49:24,850 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.2574257425742574) internal successors, (127), 100 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 803 [2022-01-31 17:49:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:24,851 INFO L225 Difference]: With dead ends: 1520 [2022-01-31 17:49:24,851 INFO L226 Difference]: Without dead ends: 816 [2022-01-31 17:49:24,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:49:24,853 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 4212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 5082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4212 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:24,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 5082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4212 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:49:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-01-31 17:49:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 816. [2022-01-31 17:49:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 810 states have (on average 1.011111111111111) internal successors, (819), 810 states have internal predecessors, (819), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 824 transitions. [2022-01-31 17:49:24,867 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 824 transitions. Word has length 803 [2022-01-31 17:49:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:24,867 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 824 transitions. [2022-01-31 17:49:24,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.2574257425742574) internal successors, (127), 100 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 824 transitions. [2022-01-31 17:49:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2022-01-31 17:49:24,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:24,882 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:24,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:49:24,882 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:24,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:24,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1877155627, now seen corresponding path program 98 times [2022-01-31 17:49:24,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:24,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139246371] [2022-01-31 17:49:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:24,888 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:24,888 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:24,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:24,931 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:28,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:28,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:28,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139246371] [2022-01-31 17:49:28,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [139246371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:28,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:28,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:49:28,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010696887] [2022-01-31 17:49:28,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:28,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:49:28,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:28,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:49:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:49:28,349 INFO L87 Difference]: Start difference. First operand 816 states and 824 transitions. Second operand has 102 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 101 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:33,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:33,507 INFO L93 Difference]: Finished difference Result 1535 states and 1558 transitions. [2022-01-31 17:49:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:49:33,507 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 101 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 811 [2022-01-31 17:49:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:33,508 INFO L225 Difference]: With dead ends: 1535 [2022-01-31 17:49:33,508 INFO L226 Difference]: Without dead ends: 824 [2022-01-31 17:49:33,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:49:33,510 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 4127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 4967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4127 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:33,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 4967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4127 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:49:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-01-31 17:49:33,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 824. [2022-01-31 17:49:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 818 states have (on average 1.011002444987775) internal successors, (827), 818 states have internal predecessors, (827), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 832 transitions. [2022-01-31 17:49:33,524 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 832 transitions. Word has length 811 [2022-01-31 17:49:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:33,524 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 832 transitions. [2022-01-31 17:49:33,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 101 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 832 transitions. [2022-01-31 17:49:33,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2022-01-31 17:49:33,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:33,529 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:33,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:49:33,529 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1936242777, now seen corresponding path program 99 times [2022-01-31 17:49:33,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:33,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525528895] [2022-01-31 17:49:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:33,530 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:33,530 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:33,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:33,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:36,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:36,963 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:36,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525528895] [2022-01-31 17:49:36,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1525528895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:36,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:36,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:49:36,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972166369] [2022-01-31 17:49:36,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:36,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:49:36,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:36,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:49:36,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:49:36,965 INFO L87 Difference]: Start difference. First operand 824 states and 832 transitions. Second operand has 103 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 102 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:42,652 INFO L93 Difference]: Finished difference Result 1550 states and 1573 transitions. [2022-01-31 17:49:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:49:42,653 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 102 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 819 [2022-01-31 17:49:42,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:42,654 INFO L225 Difference]: With dead ends: 1550 [2022-01-31 17:49:42,654 INFO L226 Difference]: Without dead ends: 832 [2022-01-31 17:49:42,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:49:42,656 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 3110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 4129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3110 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:42,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 88 Invalid, 4129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3110 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:49:42,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-31 17:49:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 832. [2022-01-31 17:49:42,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 826 states have (on average 1.0108958837772397) internal successors, (835), 826 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 17:49:42,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 840 transitions. [2022-01-31 17:49:42,670 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 840 transitions. Word has length 819 [2022-01-31 17:49:42,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:42,670 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 840 transitions. [2022-01-31 17:49:42,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 102 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:42,670 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 840 transitions. [2022-01-31 17:49:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2022-01-31 17:49:42,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:42,675 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:42,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:49:42,675 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:42,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1708990037, now seen corresponding path program 100 times [2022-01-31 17:49:42,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:42,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572961989] [2022-01-31 17:49:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:42,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:42,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:42,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:42,723 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:46,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:46,127 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:46,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572961989] [2022-01-31 17:49:46,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1572961989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:46,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:46,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:49:46,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55501637] [2022-01-31 17:49:46,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:46,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:49:46,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:46,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:49:46,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:49:46,130 INFO L87 Difference]: Start difference. First operand 832 states and 840 transitions. Second operand has 104 states, 104 states have (on average 1.25) internal successors, (130), 103 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:52,081 INFO L93 Difference]: Finished difference Result 1565 states and 1588 transitions. [2022-01-31 17:49:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:49:52,081 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.25) internal successors, (130), 103 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 827 [2022-01-31 17:49:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:52,082 INFO L225 Difference]: With dead ends: 1565 [2022-01-31 17:49:52,082 INFO L226 Difference]: Without dead ends: 840 [2022-01-31 17:49:52,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:49:52,085 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 4172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4172 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:52,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 5047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4172 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:49:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-01-31 17:49:52,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 840. [2022-01-31 17:49:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 834 states have (on average 1.0107913669064748) internal successors, (843), 834 states have internal predecessors, (843), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 848 transitions. [2022-01-31 17:49:52,098 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 848 transitions. Word has length 827 [2022-01-31 17:49:52,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:52,098 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 848 transitions. [2022-01-31 17:49:52,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.25) internal successors, (130), 103 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 848 transitions. [2022-01-31 17:49:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2022-01-31 17:49:52,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:52,103 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:52,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:49:52,103 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:52,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash -719749593, now seen corresponding path program 101 times [2022-01-31 17:49:52,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:52,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045005305] [2022-01-31 17:49:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:52,104 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:52,104 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:52,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:52,150 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:55,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:55,157 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:55,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045005305] [2022-01-31 17:49:55,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045005305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:55,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:55,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:49:55,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109885938] [2022-01-31 17:49:55,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:55,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:49:55,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:55,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:49:55,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:49:55,160 INFO L87 Difference]: Start difference. First operand 840 states and 848 transitions. Second operand has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 104 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:01,254 INFO L93 Difference]: Finished difference Result 1580 states and 1603 transitions. [2022-01-31 17:50:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:50:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 104 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 835 [2022-01-31 17:50:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:01,255 INFO L225 Difference]: With dead ends: 1580 [2022-01-31 17:50:01,255 INFO L226 Difference]: Without dead ends: 848 [2022-01-31 17:50:01,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:50:01,257 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 3950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 4833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3950 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:01,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 4833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3950 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:50:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-31 17:50:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 848. [2022-01-31 17:50:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 842 states have (on average 1.010688836104513) internal successors, (851), 842 states have internal predecessors, (851), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 856 transitions. [2022-01-31 17:50:01,270 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 856 transitions. Word has length 835 [2022-01-31 17:50:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:01,271 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 856 transitions. [2022-01-31 17:50:01,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 104 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 856 transitions. [2022-01-31 17:50:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2022-01-31 17:50:01,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:01,275 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:01,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:50:01,275 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:01,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:01,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1395196971, now seen corresponding path program 102 times [2022-01-31 17:50:01,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:01,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718491072] [2022-01-31 17:50:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:01,277 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:01,277 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:01,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:01,319 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:05,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:05,234 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:05,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718491072] [2022-01-31 17:50:05,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [718491072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:05,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:05,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:50:05,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842819714] [2022-01-31 17:50:05,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:05,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:50:05,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:05,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:50:05,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:50:05,237 INFO L87 Difference]: Start difference. First operand 848 states and 856 transitions. Second operand has 106 states, 106 states have (on average 1.2452830188679245) internal successors, (132), 105 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:11,481 INFO L93 Difference]: Finished difference Result 1595 states and 1618 transitions. [2022-01-31 17:50:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:50:11,482 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.2452830188679245) internal successors, (132), 105 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 843 [2022-01-31 17:50:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:11,483 INFO L225 Difference]: With dead ends: 1595 [2022-01-31 17:50:11,483 INFO L226 Difference]: Without dead ends: 856 [2022-01-31 17:50:11,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:50:11,485 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 4767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 5639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4767 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:11,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 5639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4767 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:50:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-01-31 17:50:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 856. [2022-01-31 17:50:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 850 states have (on average 1.0105882352941176) internal successors, (859), 850 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 17:50:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 864 transitions. [2022-01-31 17:50:11,499 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 864 transitions. Word has length 843 [2022-01-31 17:50:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:11,499 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 864 transitions. [2022-01-31 17:50:11,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.2452830188679245) internal successors, (132), 105 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 864 transitions. [2022-01-31 17:50:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2022-01-31 17:50:11,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:11,504 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:11,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:50:11,504 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:11,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:11,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1533596839, now seen corresponding path program 103 times [2022-01-31 17:50:11,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:11,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335521632] [2022-01-31 17:50:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:11,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:11,505 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:11,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:11,556 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:14,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:14,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:14,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335521632] [2022-01-31 17:50:14,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1335521632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:14,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:14,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:50:14,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006179162] [2022-01-31 17:50:14,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:14,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:50:14,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:50:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:50:14,352 INFO L87 Difference]: Start difference. First operand 856 states and 864 transitions. Second operand has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 106 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:20,056 INFO L93 Difference]: Finished difference Result 1610 states and 1633 transitions. [2022-01-31 17:50:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:50:20,057 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 106 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 851 [2022-01-31 17:50:20,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:20,058 INFO L225 Difference]: With dead ends: 1610 [2022-01-31 17:50:20,058 INFO L226 Difference]: Without dead ends: 864 [2022-01-31 17:50:20,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:50:20,060 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 4053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4053 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:20,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 4971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4053 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:50:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-01-31 17:50:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 864. [2022-01-31 17:50:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 858 states have (on average 1.0104895104895104) internal successors, (867), 858 states have internal predecessors, (867), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 872 transitions. [2022-01-31 17:50:20,074 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 872 transitions. Word has length 851 [2022-01-31 17:50:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:20,074 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 872 transitions. [2022-01-31 17:50:20,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 106 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 872 transitions. [2022-01-31 17:50:20,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2022-01-31 17:50:20,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:20,079 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:20,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:50:20,079 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:20,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:20,080 INFO L85 PathProgramCache]: Analyzing trace with hash 399869611, now seen corresponding path program 104 times [2022-01-31 17:50:20,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:20,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159245833] [2022-01-31 17:50:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:20,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:20,081 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:20,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:20,127 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:23,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:23,824 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:23,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159245833] [2022-01-31 17:50:23,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159245833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:23,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:23,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:50:23,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345078205] [2022-01-31 17:50:23,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:23,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:50:23,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:50:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:50:23,827 INFO L87 Difference]: Start difference. First operand 864 states and 872 transitions. Second operand has 108 states, 108 states have (on average 1.2407407407407407) internal successors, (134), 107 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:31,443 INFO L93 Difference]: Finished difference Result 1625 states and 1648 transitions. [2022-01-31 17:50:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:50:31,443 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.2407407407407407) internal successors, (134), 107 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 859 [2022-01-31 17:50:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:31,444 INFO L225 Difference]: With dead ends: 1625 [2022-01-31 17:50:31,444 INFO L226 Difference]: Without dead ends: 872 [2022-01-31 17:50:31,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:50:31,446 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 4244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4244 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:31,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 5208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4244 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:50:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-31 17:50:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 872. [2022-01-31 17:50:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 866 states have (on average 1.010392609699769) internal successors, (875), 866 states have internal predecessors, (875), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:31,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 880 transitions. [2022-01-31 17:50:31,460 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 880 transitions. Word has length 859 [2022-01-31 17:50:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:31,460 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 880 transitions. [2022-01-31 17:50:31,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.2407407407407407) internal successors, (134), 107 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 880 transitions. [2022-01-31 17:50:31,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2022-01-31 17:50:31,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:31,465 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:31,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:50:31,465 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1658500313, now seen corresponding path program 105 times [2022-01-31 17:50:31,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:31,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525630758] [2022-01-31 17:50:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:31,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:31,467 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:31,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:31,514 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:35,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:35,501 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 17:50:35,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:35,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525630758] [2022-01-31 17:50:35,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1525630758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:35,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:35,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:50:35,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247276176] [2022-01-31 17:50:35,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:35,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:50:35,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:35,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:50:35,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:50:35,504 INFO L87 Difference]: Start difference. First operand 872 states and 880 transitions. Second operand has 109 states, 109 states have (on average 1.238532110091743) internal successors, (135), 108 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:41,572 INFO L93 Difference]: Finished difference Result 1640 states and 1663 transitions. [2022-01-31 17:50:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:50:41,587 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.238532110091743) internal successors, (135), 108 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 867 [2022-01-31 17:50:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:41,588 INFO L225 Difference]: With dead ends: 1640 [2022-01-31 17:50:41,588 INFO L226 Difference]: Without dead ends: 880 [2022-01-31 17:50:41,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:50:41,593 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 3408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 4437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3408 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:41,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 78 Invalid, 4437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3408 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:50:41,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-01-31 17:50:41,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2022-01-31 17:50:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 874 states have (on average 1.0102974828375286) internal successors, (883), 874 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 17:50:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 888 transitions. [2022-01-31 17:50:41,609 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 888 transitions. Word has length 867 [2022-01-31 17:50:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:41,609 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 888 transitions. [2022-01-31 17:50:41,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.238532110091743) internal successors, (135), 108 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 888 transitions. [2022-01-31 17:50:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 876 [2022-01-31 17:50:41,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:41,650 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:41,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:50:41,650 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1728604459, now seen corresponding path program 106 times [2022-01-31 17:50:41,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:41,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236092652] [2022-01-31 17:50:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:41,653 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:41,653 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:41,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:41,702 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:45,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:45,527 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:45,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236092652] [2022-01-31 17:50:45,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236092652] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:45,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:45,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:50:45,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311703471] [2022-01-31 17:50:45,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:45,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:50:45,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:45,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:50:45,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:50:45,530 INFO L87 Difference]: Start difference. First operand 880 states and 888 transitions. Second operand has 110 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 109 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:52,697 INFO L93 Difference]: Finished difference Result 1655 states and 1678 transitions. [2022-01-31 17:50:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:50:52,697 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 109 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 875 [2022-01-31 17:50:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:52,711 INFO L225 Difference]: With dead ends: 1655 [2022-01-31 17:50:52,711 INFO L226 Difference]: Without dead ends: 888 [2022-01-31 17:50:52,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:50:52,714 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 3801 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 4800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3801 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:52,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 4800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3801 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:50:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-01-31 17:50:52,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 888. [2022-01-31 17:50:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 882 states have (on average 1.010204081632653) internal successors, (891), 882 states have internal predecessors, (891), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 896 transitions. [2022-01-31 17:50:52,735 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 896 transitions. Word has length 875 [2022-01-31 17:50:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:52,735 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 896 transitions. [2022-01-31 17:50:52,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 109 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:52,735 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 896 transitions. [2022-01-31 17:50:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2022-01-31 17:50:52,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:52,740 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:52,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:50:52,740 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:52,741 INFO L85 PathProgramCache]: Analyzing trace with hash 904847783, now seen corresponding path program 107 times [2022-01-31 17:50:52,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:52,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192347728] [2022-01-31 17:50:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:52,743 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:52,743 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:52,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:52,849 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:56,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:56,533 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 17:50:56,533 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:56,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192347728] [2022-01-31 17:50:56,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1192347728] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:56,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:56,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:50:56,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12847393] [2022-01-31 17:50:56,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:56,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:50:56,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:50:56,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:50:56,536 INFO L87 Difference]: Start difference. First operand 888 states and 896 transitions. Second operand has 111 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 110 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:03,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:03,703 INFO L93 Difference]: Finished difference Result 1670 states and 1693 transitions. [2022-01-31 17:51:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:51:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 110 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 883 [2022-01-31 17:51:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:03,704 INFO L225 Difference]: With dead ends: 1670 [2022-01-31 17:51:03,704 INFO L226 Difference]: Without dead ends: 896 [2022-01-31 17:51:03,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:51:03,707 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 4481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4481 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:03,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 5450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4481 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:51:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-01-31 17:51:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2022-01-31 17:51:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 890 states have (on average 1.010112359550562) internal successors, (899), 890 states have internal predecessors, (899), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 904 transitions. [2022-01-31 17:51:03,721 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 904 transitions. Word has length 883 [2022-01-31 17:51:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:03,721 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 904 transitions. [2022-01-31 17:51:03,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 110 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 904 transitions. [2022-01-31 17:51:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2022-01-31 17:51:03,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:03,727 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:03,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:51:03,727 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:03,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:03,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1046369365, now seen corresponding path program 108 times [2022-01-31 17:51:03,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:03,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055512416] [2022-01-31 17:51:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:03,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:03,728 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:03,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:03,849 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:07,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:07,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:07,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055512416] [2022-01-31 17:51:07,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1055512416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:07,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:07,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:51:07,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031926797] [2022-01-31 17:51:07,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:07,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:51:07,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:51:07,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:51:07,955 INFO L87 Difference]: Start difference. First operand 896 states and 904 transitions. Second operand has 112 states, 112 states have (on average 1.2321428571428572) internal successors, (138), 111 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:14,153 INFO L93 Difference]: Finished difference Result 1685 states and 1708 transitions. [2022-01-31 17:51:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:51:14,154 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.2321428571428572) internal successors, (138), 111 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 891 [2022-01-31 17:51:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:14,155 INFO L225 Difference]: With dead ends: 1685 [2022-01-31 17:51:14,155 INFO L226 Difference]: Without dead ends: 904 [2022-01-31 17:51:14,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:51:14,157 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 3777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3777 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:14,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 4735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3777 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:51:14,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-31 17:51:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 904. [2022-01-31 17:51:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 898 states have (on average 1.010022271714922) internal successors, (907), 898 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 17:51:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 912 transitions. [2022-01-31 17:51:14,173 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 912 transitions. Word has length 891 [2022-01-31 17:51:14,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:14,173 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 912 transitions. [2022-01-31 17:51:14,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.2321428571428572) internal successors, (138), 111 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:14,173 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 912 transitions. [2022-01-31 17:51:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 900 [2022-01-31 17:51:14,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:14,178 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:14,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:51:14,178 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:14,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:14,178 INFO L85 PathProgramCache]: Analyzing trace with hash -546990041, now seen corresponding path program 109 times [2022-01-31 17:51:14,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:14,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761223644] [2022-01-31 17:51:14,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:14,180 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:14,180 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:14,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:14,236 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:18,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:18,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:18,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761223644] [2022-01-31 17:51:18,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1761223644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:18,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:18,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:51:18,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209458412] [2022-01-31 17:51:18,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:18,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:51:18,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:51:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:51:18,272 INFO L87 Difference]: Start difference. First operand 904 states and 912 transitions. Second operand has 113 states, 113 states have (on average 1.2300884955752212) internal successors, (139), 112 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:25,038 INFO L93 Difference]: Finished difference Result 1700 states and 1723 transitions. [2022-01-31 17:51:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:51:25,038 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.2300884955752212) internal successors, (139), 112 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 899 [2022-01-31 17:51:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:25,040 INFO L225 Difference]: With dead ends: 1700 [2022-01-31 17:51:25,040 INFO L226 Difference]: Without dead ends: 912 [2022-01-31 17:51:25,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:51:25,042 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 3909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 4913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3909 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:25,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 4913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3909 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:51:25,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-01-31 17:51:25,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 912. [2022-01-31 17:51:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 906 states have (on average 1.009933774834437) internal successors, (915), 906 states have internal predecessors, (915), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:25,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 920 transitions. [2022-01-31 17:51:25,057 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 920 transitions. Word has length 899 [2022-01-31 17:51:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:25,057 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 920 transitions. [2022-01-31 17:51:25,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.2300884955752212) internal successors, (139), 112 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 920 transitions. [2022-01-31 17:51:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2022-01-31 17:51:25,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:25,063 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:25,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:51:25,063 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:25,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1434366421, now seen corresponding path program 110 times [2022-01-31 17:51:25,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:25,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310174799] [2022-01-31 17:51:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:25,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:25,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:25,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:25,117 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:28,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:28,914 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:28,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310174799] [2022-01-31 17:51:28,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310174799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:28,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:28,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:51:28,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298704284] [2022-01-31 17:51:28,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:28,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:51:28,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:51:28,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:51:28,917 INFO L87 Difference]: Start difference. First operand 912 states and 920 transitions. Second operand has 114 states, 114 states have (on average 1.2280701754385965) internal successors, (140), 113 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:35,451 INFO L93 Difference]: Finished difference Result 1715 states and 1738 transitions. [2022-01-31 17:51:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:51:35,452 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.2280701754385965) internal successors, (140), 113 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 907 [2022-01-31 17:51:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:35,453 INFO L225 Difference]: With dead ends: 1715 [2022-01-31 17:51:35,453 INFO L226 Difference]: Without dead ends: 920 [2022-01-31 17:51:35,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:51:35,459 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 4633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4633 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:35,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 5588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4633 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:51:35,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-01-31 17:51:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 920. [2022-01-31 17:51:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 914 states have (on average 1.0098468271334793) internal successors, (923), 914 states have internal predecessors, (923), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 928 transitions. [2022-01-31 17:51:35,473 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 928 transitions. Word has length 907 [2022-01-31 17:51:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:35,474 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 928 transitions. [2022-01-31 17:51:35,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.2280701754385965) internal successors, (140), 113 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 928 transitions. [2022-01-31 17:51:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2022-01-31 17:51:35,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:35,479 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:35,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:51:35,479 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:35,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1898540711, now seen corresponding path program 111 times [2022-01-31 17:51:35,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:35,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826122360] [2022-01-31 17:51:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:35,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:35,480 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:35,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:35,531 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:39,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:39,237 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:39,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826122360] [2022-01-31 17:51:39,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [826122360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:39,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:39,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:51:39,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951778597] [2022-01-31 17:51:39,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:39,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:51:39,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:39,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:51:39,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:51:39,241 INFO L87 Difference]: Start difference. First operand 920 states and 928 transitions. Second operand has 115 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 114 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:47,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:47,904 INFO L93 Difference]: Finished difference Result 1730 states and 1753 transitions. [2022-01-31 17:51:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:51:47,904 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 114 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 915 [2022-01-31 17:51:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:47,905 INFO L225 Difference]: With dead ends: 1730 [2022-01-31 17:51:47,905 INFO L226 Difference]: Without dead ends: 928 [2022-01-31 17:51:47,908 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 17:51:47,908 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 4568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 5550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4568 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:47,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 5550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4568 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:51:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-01-31 17:51:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-01-31 17:51:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 922 states have (on average 1.009761388286334) internal successors, (931), 922 states have internal predecessors, (931), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 936 transitions. [2022-01-31 17:51:47,922 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 936 transitions. Word has length 915 [2022-01-31 17:51:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:47,923 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 936 transitions. [2022-01-31 17:51:47,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 114 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 936 transitions. [2022-01-31 17:51:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2022-01-31 17:51:47,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:47,928 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:47,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:51:47,928 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:47,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1501081429, now seen corresponding path program 112 times [2022-01-31 17:51:47,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:47,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948465223] [2022-01-31 17:51:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:47,929 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:47,929 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:47,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:47,992 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:51,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:51,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948465223] [2022-01-31 17:51:51,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [948465223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:51,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:51,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:51:51,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430888830] [2022-01-31 17:51:51,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:51,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:51:51,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:51,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:51:51,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:51:51,977 INFO L87 Difference]: Start difference. First operand 928 states and 936 transitions. Second operand has 116 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 115 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:59,461 INFO L93 Difference]: Finished difference Result 1745 states and 1768 transitions. [2022-01-31 17:51:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:51:59,461 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 115 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 923 [2022-01-31 17:51:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:59,462 INFO L225 Difference]: With dead ends: 1745 [2022-01-31 17:51:59,462 INFO L226 Difference]: Without dead ends: 936 [2022-01-31 17:51:59,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:51:59,465 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 4410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4410 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:59,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 5381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4410 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:51:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-01-31 17:51:59,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 936. [2022-01-31 17:51:59,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 930 states have (on average 1.0096774193548388) internal successors, (939), 930 states have internal predecessors, (939), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 944 transitions. [2022-01-31 17:51:59,517 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 944 transitions. Word has length 923 [2022-01-31 17:51:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:59,517 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 944 transitions. [2022-01-31 17:51:59,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 115 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:59,517 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 944 transitions. [2022-01-31 17:51:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 932 [2022-01-31 17:51:59,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:59,523 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:59,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:51:59,523 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:59,523 INFO L85 PathProgramCache]: Analyzing trace with hash -522558169, now seen corresponding path program 113 times [2022-01-31 17:51:59,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:59,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114404897] [2022-01-31 17:51:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:59,524 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:59,524 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:59,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:59,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:04,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:04,011 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 17:52:04,012 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114404897] [2022-01-31 17:52:04,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [114404897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:04,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:04,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:52:04,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789755509] [2022-01-31 17:52:04,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:04,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:52:04,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:04,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:52:04,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:52:04,014 INFO L87 Difference]: Start difference. First operand 936 states and 944 transitions. Second operand has 117 states, 117 states have (on average 1.2222222222222223) internal successors, (143), 116 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:12,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:12,156 INFO L93 Difference]: Finished difference Result 1760 states and 1783 transitions. [2022-01-31 17:52:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:52:12,156 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.2222222222222223) internal successors, (143), 116 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 931 [2022-01-31 17:52:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:12,158 INFO L225 Difference]: With dead ends: 1760 [2022-01-31 17:52:12,158 INFO L226 Difference]: Without dead ends: 944 [2022-01-31 17:52:12,160 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 17:52:12,160 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 4445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4445 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:12,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 5519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4445 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:52:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-01-31 17:52:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 944. [2022-01-31 17:52:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 938 states have (on average 1.0095948827292112) internal successors, (947), 938 states have internal predecessors, (947), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 952 transitions. [2022-01-31 17:52:12,176 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 952 transitions. Word has length 931 [2022-01-31 17:52:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:12,176 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 952 transitions. [2022-01-31 17:52:12,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.2222222222222223) internal successors, (143), 116 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 952 transitions. [2022-01-31 17:52:12,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2022-01-31 17:52:12,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:12,182 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:12,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:52:12,182 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:12,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:12,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1016312619, now seen corresponding path program 114 times [2022-01-31 17:52:12,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:12,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792644133] [2022-01-31 17:52:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:12,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:12,183 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:12,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:12,248 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:16,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:16,922 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:16,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792644133] [2022-01-31 17:52:16,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1792644133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:16,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:16,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:52:16,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402967081] [2022-01-31 17:52:16,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:16,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:52:16,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:16,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:52:16,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:52:16,925 INFO L87 Difference]: Start difference. First operand 944 states and 952 transitions. Second operand has 118 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 117 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:26,230 INFO L93 Difference]: Finished difference Result 1775 states and 1798 transitions. [2022-01-31 17:52:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:52:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 117 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 939 [2022-01-31 17:52:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:26,231 INFO L225 Difference]: With dead ends: 1775 [2022-01-31 17:52:26,231 INFO L226 Difference]: Without dead ends: 952 [2022-01-31 17:52:26,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:52:26,234 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 4236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4236 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:26,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 5299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4236 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:52:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-01-31 17:52:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 952. [2022-01-31 17:52:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 946 states have (on average 1.0095137420718816) internal successors, (955), 946 states have internal predecessors, (955), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 960 transitions. [2022-01-31 17:52:26,248 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 960 transitions. Word has length 939 [2022-01-31 17:52:26,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:26,249 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 960 transitions. [2022-01-31 17:52:26,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 117 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 960 transitions. [2022-01-31 17:52:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2022-01-31 17:52:26,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:26,254 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:26,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:52:26,255 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:26,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1108900775, now seen corresponding path program 115 times [2022-01-31 17:52:26,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:26,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209271159] [2022-01-31 17:52:26,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:26,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:26,256 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:26,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:26,315 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:30,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:30,772 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:30,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209271159] [2022-01-31 17:52:30,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1209271159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:30,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:30,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:52:30,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925644481] [2022-01-31 17:52:30,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:30,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:52:30,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:30,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:52:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:52:30,774 INFO L87 Difference]: Start difference. First operand 952 states and 960 transitions. Second operand has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 118 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:38,540 INFO L93 Difference]: Finished difference Result 1790 states and 1813 transitions. [2022-01-31 17:52:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:52:38,540 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 118 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 947 [2022-01-31 17:52:38,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:38,542 INFO L225 Difference]: With dead ends: 1790 [2022-01-31 17:52:38,542 INFO L226 Difference]: Without dead ends: 960 [2022-01-31 17:52:38,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:52:38,544 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 4443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4443 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:38,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 5495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4443 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:52:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-01-31 17:52:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 960. [2022-01-31 17:52:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 954 states have (on average 1.009433962264151) internal successors, (963), 954 states have internal predecessors, (963), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:38,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 968 transitions. [2022-01-31 17:52:38,560 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 968 transitions. Word has length 947 [2022-01-31 17:52:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:38,561 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 968 transitions. [2022-01-31 17:52:38,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 118 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 968 transitions. [2022-01-31 17:52:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2022-01-31 17:52:38,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:38,566 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:38,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:52:38,567 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:38,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash -175737429, now seen corresponding path program 116 times [2022-01-31 17:52:38,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:38,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232568887] [2022-01-31 17:52:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:38,568 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:38,568 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:38,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:38,632 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:43,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:43,702 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:43,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232568887] [2022-01-31 17:52:43,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [232568887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:43,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:43,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:52:43,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620642719] [2022-01-31 17:52:43,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:43,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:52:43,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:52:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:52:43,704 INFO L87 Difference]: Start difference. First operand 960 states and 968 transitions. Second operand has 120 states, 120 states have (on average 1.2166666666666666) internal successors, (146), 119 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:52,370 INFO L93 Difference]: Finished difference Result 1805 states and 1828 transitions. [2022-01-31 17:52:52,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:52:52,370 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.2166666666666666) internal successors, (146), 119 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 955 [2022-01-31 17:52:52,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:52,372 INFO L225 Difference]: With dead ends: 1805 [2022-01-31 17:52:52,372 INFO L226 Difference]: Without dead ends: 968 [2022-01-31 17:52:52,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:52:52,374 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 4538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 5560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4538 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:52,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 5560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4538 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:52:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-01-31 17:52:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 968. [2022-01-31 17:52:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 962 states have (on average 1.0093555093555093) internal successors, (971), 962 states have internal predecessors, (971), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 976 transitions. [2022-01-31 17:52:52,390 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 976 transitions. Word has length 955 [2022-01-31 17:52:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:52,390 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 976 transitions. [2022-01-31 17:52:52,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.2166666666666666) internal successors, (146), 119 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 976 transitions. [2022-01-31 17:52:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2022-01-31 17:52:52,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:52,396 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:52,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:52:52,396 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:52,396 INFO L85 PathProgramCache]: Analyzing trace with hash -964447705, now seen corresponding path program 117 times [2022-01-31 17:52:52,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:52,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152514467] [2022-01-31 17:52:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:52,397 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:52,397 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:52,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:52,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:56,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:56,199 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:56,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152514467] [2022-01-31 17:52:56,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1152514467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:56,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:56,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:52:56,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218457795] [2022-01-31 17:52:56,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:56,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:52:56,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:56,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:52:56,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:52:56,202 INFO L87 Difference]: Start difference. First operand 968 states and 976 transitions. Second operand has 121 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 120 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:04,764 INFO L93 Difference]: Finished difference Result 1820 states and 1843 transitions. [2022-01-31 17:53:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:53:04,764 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 120 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 963 [2022-01-31 17:53:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:04,765 INFO L225 Difference]: With dead ends: 1820 [2022-01-31 17:53:04,766 INFO L226 Difference]: Without dead ends: 976 [2022-01-31 17:53:04,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:53:04,769 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 4499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4499 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:04,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 5586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4499 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:53:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-01-31 17:53:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 976. [2022-01-31 17:53:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 970 states have (on average 1.0092783505154639) internal successors, (979), 970 states have internal predecessors, (979), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 984 transitions. [2022-01-31 17:53:04,786 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 984 transitions. Word has length 963 [2022-01-31 17:53:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:04,786 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 984 transitions. [2022-01-31 17:53:04,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 120 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 984 transitions. [2022-01-31 17:53:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 972 [2022-01-31 17:53:04,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:04,792 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:04,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:53:04,792 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:04,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:04,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1547671595, now seen corresponding path program 118 times [2022-01-31 17:53:04,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:04,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572736018] [2022-01-31 17:53:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:04,793 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:04,793 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:04,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:04,859 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:09,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:09,269 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:09,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572736018] [2022-01-31 17:53:09,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1572736018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:09,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:09,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:53:09,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054660736] [2022-01-31 17:53:09,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:09,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:53:09,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:09,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:53:09,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:53:09,272 INFO L87 Difference]: Start difference. First operand 976 states and 984 transitions. Second operand has 122 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 121 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:19,431 INFO L93 Difference]: Finished difference Result 1835 states and 1858 transitions. [2022-01-31 17:53:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:53:19,431 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 121 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 971 [2022-01-31 17:53:19,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:19,432 INFO L225 Difference]: With dead ends: 1835 [2022-01-31 17:53:19,432 INFO L226 Difference]: Without dead ends: 984 [2022-01-31 17:53:19,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:53:19,435 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 5086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5086 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:19,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 6124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5086 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:53:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-01-31 17:53:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 984. [2022-01-31 17:53:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 978 states have (on average 1.00920245398773) internal successors, (987), 978 states have internal predecessors, (987), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 992 transitions. [2022-01-31 17:53:19,451 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 992 transitions. Word has length 971 [2022-01-31 17:53:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:19,452 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 992 transitions. [2022-01-31 17:53:19,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 121 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 992 transitions. [2022-01-31 17:53:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2022-01-31 17:53:19,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:19,458 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:19,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:53:19,458 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:19,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:19,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1111750489, now seen corresponding path program 119 times [2022-01-31 17:53:19,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:19,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028845060] [2022-01-31 17:53:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:19,459 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:19,459 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:19,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:19,524 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:23,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:23,967 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:23,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028845060] [2022-01-31 17:53:23,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2028845060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:23,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:23,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:53:23,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974622810] [2022-01-31 17:53:23,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:23,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:53:23,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:23,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:53:23,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:53:23,971 INFO L87 Difference]: Start difference. First operand 984 states and 992 transitions. Second operand has 123 states, 123 states have (on average 1.2113821138211383) internal successors, (149), 122 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:31,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:31,992 INFO L93 Difference]: Finished difference Result 1850 states and 1873 transitions. [2022-01-31 17:53:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:53:31,992 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.2113821138211383) internal successors, (149), 122 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 979 [2022-01-31 17:53:31,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:31,994 INFO L225 Difference]: With dead ends: 1850 [2022-01-31 17:53:31,994 INFO L226 Difference]: Without dead ends: 992 [2022-01-31 17:53:31,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:53:31,996 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 4577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4577 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:31,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 5699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4577 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:53:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-01-31 17:53:32,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 992. [2022-01-31 17:53:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 986 states have (on average 1.0091277890466532) internal successors, (995), 986 states have internal predecessors, (995), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1000 transitions. [2022-01-31 17:53:32,012 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1000 transitions. Word has length 979 [2022-01-31 17:53:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:32,012 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1000 transitions. [2022-01-31 17:53:32,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.2113821138211383) internal successors, (149), 122 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1000 transitions. [2022-01-31 17:53:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 988 [2022-01-31 17:53:32,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:32,019 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:32,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:53:32,019 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:32,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:32,019 INFO L85 PathProgramCache]: Analyzing trace with hash -39904597, now seen corresponding path program 120 times [2022-01-31 17:53:32,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:32,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140615644] [2022-01-31 17:53:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:32,020 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:32,020 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:32,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:32,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:36,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:36,561 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:36,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140615644] [2022-01-31 17:53:36,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [140615644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:36,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:36,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:53:36,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005991047] [2022-01-31 17:53:36,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:36,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:53:36,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:36,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:53:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:53:36,565 INFO L87 Difference]: Start difference. First operand 992 states and 1000 transitions. Second operand has 124 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 123 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:46,259 INFO L93 Difference]: Finished difference Result 1865 states and 1888 transitions. [2022-01-31 17:53:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:53:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 123 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 987 [2022-01-31 17:53:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:46,261 INFO L225 Difference]: With dead ends: 1865 [2022-01-31 17:53:46,261 INFO L226 Difference]: Without dead ends: 1000 [2022-01-31 17:53:46,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:53:46,263 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 4411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4411 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:46,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 5484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4411 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:53:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2022-01-31 17:53:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 1000. [2022-01-31 17:53:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 994 states have (on average 1.0090543259557343) internal successors, (1003), 994 states have internal predecessors, (1003), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:46,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1008 transitions. [2022-01-31 17:53:46,292 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1008 transitions. Word has length 987 [2022-01-31 17:53:46,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:46,292 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 1008 transitions. [2022-01-31 17:53:46,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 123 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1008 transitions. [2022-01-31 17:53:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2022-01-31 17:53:46,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:46,298 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:46,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:53:46,298 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1788772569, now seen corresponding path program 121 times [2022-01-31 17:53:46,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:46,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601678254] [2022-01-31 17:53:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:46,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:46,300 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:46,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:46,368 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:51,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:51,022 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:51,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601678254] [2022-01-31 17:53:51,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601678254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:51,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:51,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:53:51,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153054164] [2022-01-31 17:53:51,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:51,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:53:51,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:51,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:53:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:53:51,026 INFO L87 Difference]: Start difference. First operand 1000 states and 1008 transitions. Second operand has 125 states, 125 states have (on average 1.208) internal successors, (151), 124 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:59,873 INFO L93 Difference]: Finished difference Result 1880 states and 1903 transitions. [2022-01-31 17:53:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:53:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.208) internal successors, (151), 124 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 995 [2022-01-31 17:53:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:59,874 INFO L225 Difference]: With dead ends: 1880 [2022-01-31 17:53:59,875 INFO L226 Difference]: Without dead ends: 1008 [2022-01-31 17:53:59,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:53:59,877 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 4032 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4032 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:59,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 5170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4032 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:53:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-01-31 17:53:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1008. [2022-01-31 17:53:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1002 states have (on average 1.0089820359281436) internal successors, (1011), 1002 states have internal predecessors, (1011), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1016 transitions. [2022-01-31 17:53:59,893 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1016 transitions. Word has length 995 [2022-01-31 17:53:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:59,893 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1016 transitions. [2022-01-31 17:53:59,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.208) internal successors, (151), 124 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1016 transitions. [2022-01-31 17:53:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1004 [2022-01-31 17:53:59,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:59,900 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:59,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:53:59,900 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1753546027, now seen corresponding path program 122 times [2022-01-31 17:53:59,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:59,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363025384] [2022-01-31 17:53:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:59,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:59,901 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:59,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:00,006 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:05,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:05,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:05,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363025384] [2022-01-31 17:54:05,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363025384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:05,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:05,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:54:05,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714376881] [2022-01-31 17:54:05,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:05,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:54:05,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:05,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:54:05,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:54:05,011 INFO L87 Difference]: Start difference. First operand 1008 states and 1016 transitions. Second operand has 126 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 125 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:13,986 INFO L93 Difference]: Finished difference Result 1895 states and 1918 transitions. [2022-01-31 17:54:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:54:13,986 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 125 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1003 [2022-01-31 17:54:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:13,987 INFO L225 Difference]: With dead ends: 1895 [2022-01-31 17:54:13,987 INFO L226 Difference]: Without dead ends: 1016 [2022-01-31 17:54:13,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:54:13,990 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 4609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4609 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:13,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 5755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4609 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:54:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-31 17:54:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 1016. [2022-01-31 17:54:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1010 states have (on average 1.008910891089109) internal successors, (1019), 1010 states have internal predecessors, (1019), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1024 transitions. [2022-01-31 17:54:14,006 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1024 transitions. Word has length 1003 [2022-01-31 17:54:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:14,007 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 1024 transitions. [2022-01-31 17:54:14,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 125 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1024 transitions. [2022-01-31 17:54:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2022-01-31 17:54:14,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:14,013 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:14,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:54:14,013 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash -652995161, now seen corresponding path program 123 times [2022-01-31 17:54:14,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:14,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336753369] [2022-01-31 17:54:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:14,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:14,014 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:14,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:14,079 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:18,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:18,552 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:18,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336753369] [2022-01-31 17:54:18,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [336753369] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:18,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:18,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:54:18,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436398168] [2022-01-31 17:54:18,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:18,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:54:18,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:18,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:54:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:54:18,555 INFO L87 Difference]: Start difference. First operand 1016 states and 1024 transitions. Second operand has 127 states, 127 states have (on average 1.204724409448819) internal successors, (153), 126 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:28,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:28,075 INFO L93 Difference]: Finished difference Result 1910 states and 1933 transitions. [2022-01-31 17:54:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:54:28,075 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.204724409448819) internal successors, (153), 126 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 1011 [2022-01-31 17:54:28,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:28,076 INFO L225 Difference]: With dead ends: 1910 [2022-01-31 17:54:28,076 INFO L226 Difference]: Without dead ends: 1024 [2022-01-31 17:54:28,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:54:28,079 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 4551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4551 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:28,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 5667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4551 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:54:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-01-31 17:54:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1024. [2022-01-31 17:54:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1018 states have (on average 1.0088408644400786) internal successors, (1027), 1018 states have internal predecessors, (1027), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1032 transitions. [2022-01-31 17:54:28,095 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1032 transitions. Word has length 1011 [2022-01-31 17:54:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:28,098 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1032 transitions. [2022-01-31 17:54:28,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.204724409448819) internal successors, (153), 126 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1032 transitions. [2022-01-31 17:54:28,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1020 [2022-01-31 17:54:28,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:28,105 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:28,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:54:28,105 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash 768688043, now seen corresponding path program 124 times [2022-01-31 17:54:28,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:28,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384618586] [2022-01-31 17:54:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:28,106 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:28,106 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:28,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:28,176 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:32,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:32,586 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:32,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384618586] [2022-01-31 17:54:32,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384618586] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:32,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:32,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:54:32,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271437543] [2022-01-31 17:54:32,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:32,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:54:32,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:32,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:54:32,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:54:32,590 INFO L87 Difference]: Start difference. First operand 1024 states and 1032 transitions. Second operand has 128 states, 128 states have (on average 1.203125) internal successors, (154), 127 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:42,190 INFO L93 Difference]: Finished difference Result 1925 states and 1948 transitions. [2022-01-31 17:54:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:54:42,191 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.203125) internal successors, (154), 127 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1019 [2022-01-31 17:54:42,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:42,192 INFO L225 Difference]: With dead ends: 1925 [2022-01-31 17:54:42,192 INFO L226 Difference]: Without dead ends: 1032 [2022-01-31 17:54:42,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:54:42,194 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 4626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4626 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:42,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 5788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4626 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:54:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-31 17:54:42,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1032. [2022-01-31 17:54:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1026 states have (on average 1.0087719298245614) internal successors, (1035), 1026 states have internal predecessors, (1035), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1040 transitions. [2022-01-31 17:54:42,211 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1040 transitions. Word has length 1019 [2022-01-31 17:54:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:42,218 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1040 transitions. [2022-01-31 17:54:42,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.203125) internal successors, (154), 127 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1040 transitions. [2022-01-31 17:54:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1028 [2022-01-31 17:54:42,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:42,225 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:42,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:54:42,225 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:42,225 INFO L85 PathProgramCache]: Analyzing trace with hash 846449703, now seen corresponding path program 125 times [2022-01-31 17:54:42,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:42,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571162958] [2022-01-31 17:54:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:42,227 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:42,227 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:42,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:42,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:47,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:47,059 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:47,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571162958] [2022-01-31 17:54:47,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [571162958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:47,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:47,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:54:47,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556720733] [2022-01-31 17:54:47,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:47,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:54:47,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:54:47,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:54:47,062 INFO L87 Difference]: Start difference. First operand 1032 states and 1040 transitions. Second operand has 129 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 128 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:56,389 INFO L93 Difference]: Finished difference Result 1940 states and 1963 transitions. [2022-01-31 17:54:56,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:54:56,389 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 128 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 1027 [2022-01-31 17:54:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:56,390 INFO L225 Difference]: With dead ends: 1940 [2022-01-31 17:54:56,390 INFO L226 Difference]: Without dead ends: 1040 [2022-01-31 17:54:56,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:54:56,392 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 4318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4318 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:56,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 5469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4318 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:54:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2022-01-31 17:54:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1040. [2022-01-31 17:54:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1034 states have (on average 1.0087040618955512) internal successors, (1043), 1034 states have internal predecessors, (1043), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1048 transitions. [2022-01-31 17:54:56,409 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1048 transitions. Word has length 1027 [2022-01-31 17:54:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:56,409 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1048 transitions. [2022-01-31 17:54:56,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 128 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1048 transitions. [2022-01-31 17:54:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2022-01-31 17:54:56,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:56,415 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:56,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:54:56,416 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash -530324949, now seen corresponding path program 126 times [2022-01-31 17:54:56,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:56,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222753677] [2022-01-31 17:54:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:56,417 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:56,417 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:56,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:56,486 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:00,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:00,772 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:00,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222753677] [2022-01-31 17:55:00,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [222753677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:00,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:00,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:55:00,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050273975] [2022-01-31 17:55:00,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:00,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:55:00,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:00,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:55:00,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:55:00,779 INFO L87 Difference]: Start difference. First operand 1040 states and 1048 transitions. Second operand has 130 states, 130 states have (on average 1.2) internal successors, (156), 129 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:11,360 INFO L93 Difference]: Finished difference Result 1955 states and 1978 transitions. [2022-01-31 17:55:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:55:11,361 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.2) internal successors, (156), 129 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1035 [2022-01-31 17:55:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:11,361 INFO L225 Difference]: With dead ends: 1955 [2022-01-31 17:55:11,361 INFO L226 Difference]: Without dead ends: 1048 [2022-01-31 17:55:11,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:55:11,364 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 6185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 7287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6185 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:11,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 7287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6185 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:55:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-01-31 17:55:11,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1048. [2022-01-31 17:55:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1042 states have (on average 1.0086372360844529) internal successors, (1051), 1042 states have internal predecessors, (1051), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1056 transitions. [2022-01-31 17:55:11,381 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1056 transitions. Word has length 1035 [2022-01-31 17:55:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:11,381 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 1056 transitions. [2022-01-31 17:55:11,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.2) internal successors, (156), 129 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1056 transitions. [2022-01-31 17:55:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1044 [2022-01-31 17:55:11,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:11,387 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:11,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:55:11,388 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1763746471, now seen corresponding path program 127 times [2022-01-31 17:55:11,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:11,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424754745] [2022-01-31 17:55:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:11,389 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:11,389 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:11,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:11,459 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:15,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:15,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:15,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424754745] [2022-01-31 17:55:15,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1424754745] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:15,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:15,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:55:15,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37821940] [2022-01-31 17:55:15,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:15,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:55:15,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:15,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:55:15,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:55:15,847 INFO L87 Difference]: Start difference. First operand 1048 states and 1056 transitions. Second operand has 131 states, 131 states have (on average 1.1984732824427482) internal successors, (157), 130 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:26,136 INFO L93 Difference]: Finished difference Result 1970 states and 1993 transitions. [2022-01-31 17:55:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:55:26,137 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1984732824427482) internal successors, (157), 130 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 1043 [2022-01-31 17:55:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:26,138 INFO L225 Difference]: With dead ends: 1970 [2022-01-31 17:55:26,138 INFO L226 Difference]: Without dead ends: 1056 [2022-01-31 17:55:26,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:55:26,141 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 5124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 6272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5124 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:26,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 6272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5124 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:55:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-01-31 17:55:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1056. [2022-01-31 17:55:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1050 states have (on average 1.0085714285714287) internal successors, (1059), 1050 states have internal predecessors, (1059), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1064 transitions. [2022-01-31 17:55:26,157 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1064 transitions. Word has length 1043 [2022-01-31 17:55:26,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:26,157 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1064 transitions. [2022-01-31 17:55:26,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1984732824427482) internal successors, (157), 130 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:26,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1064 transitions. [2022-01-31 17:55:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1052 [2022-01-31 17:55:26,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:26,164 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:26,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:55:26,164 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:26,164 INFO L85 PathProgramCache]: Analyzing trace with hash 354215083, now seen corresponding path program 128 times [2022-01-31 17:55:26,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:26,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773330826] [2022-01-31 17:55:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:26,165 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:26,166 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:26,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:26,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:30,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:30,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:30,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773330826] [2022-01-31 17:55:30,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [773330826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:30,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:30,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:55:30,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048573765] [2022-01-31 17:55:30,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:30,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:55:30,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:55:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:55:30,131 INFO L87 Difference]: Start difference. First operand 1056 states and 1064 transitions. Second operand has 132 states, 132 states have (on average 1.196969696969697) internal successors, (158), 131 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:40,286 INFO L93 Difference]: Finished difference Result 1985 states and 2008 transitions. [2022-01-31 17:55:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:55:40,286 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.196969696969697) internal successors, (158), 131 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1051 [2022-01-31 17:55:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:40,287 INFO L225 Difference]: With dead ends: 1985 [2022-01-31 17:55:40,287 INFO L226 Difference]: Without dead ends: 1064 [2022-01-31 17:55:40,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:55:40,290 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 4850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 6025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4850 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:40,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 6025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4850 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:55:40,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-01-31 17:55:40,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1064. [2022-01-31 17:55:40,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1058 states have (on average 1.0085066162570888) internal successors, (1067), 1058 states have internal predecessors, (1067), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1072 transitions. [2022-01-31 17:55:40,333 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1072 transitions. Word has length 1051 [2022-01-31 17:55:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:40,333 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 1072 transitions. [2022-01-31 17:55:40,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.196969696969697) internal successors, (158), 131 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1072 transitions. [2022-01-31 17:55:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2022-01-31 17:55:40,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:40,340 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:40,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:55:40,340 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:40,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1656396071, now seen corresponding path program 129 times [2022-01-31 17:55:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:40,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758267717] [2022-01-31 17:55:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:40,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:40,342 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:40,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:40,442 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:44,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:44,905 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:44,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758267717] [2022-01-31 17:55:44,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758267717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:44,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:44,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:55:44,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659332271] [2022-01-31 17:55:44,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:44,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:55:44,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:44,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:55:44,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:55:44,909 INFO L87 Difference]: Start difference. First operand 1064 states and 1072 transitions. Second operand has 133 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 132 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:55,452 INFO L93 Difference]: Finished difference Result 2000 states and 2023 transitions. [2022-01-31 17:55:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:55:55,452 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 132 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 1059 [2022-01-31 17:55:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:55,453 INFO L225 Difference]: With dead ends: 2000 [2022-01-31 17:55:55,453 INFO L226 Difference]: Without dead ends: 1072 [2022-01-31 17:55:55,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:55:55,456 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 4809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4809 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:55,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 5973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4809 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:55:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-01-31 17:55:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2022-01-31 17:55:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1066 states have (on average 1.0084427767354596) internal successors, (1075), 1066 states have internal predecessors, (1075), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1080 transitions. [2022-01-31 17:55:55,473 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1080 transitions. Word has length 1059 [2022-01-31 17:55:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:55,473 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1080 transitions. [2022-01-31 17:55:55,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 132 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1080 transitions. [2022-01-31 17:55:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2022-01-31 17:55:55,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:55,480 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:55,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:55:55,480 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:55,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1658603307, now seen corresponding path program 130 times [2022-01-31 17:55:55,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:55,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859189612] [2022-01-31 17:55:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:55,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:55,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:55,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:55,553 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:59,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:59,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:59,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859189612] [2022-01-31 17:55:59,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [859189612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:59,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:59,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:55:59,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522355375] [2022-01-31 17:55:59,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:59,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:55:59,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:59,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:55:59,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:55:59,711 INFO L87 Difference]: Start difference. First operand 1072 states and 1080 transitions. Second operand has 134 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 133 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:10,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:10,324 INFO L93 Difference]: Finished difference Result 2015 states and 2038 transitions. [2022-01-31 17:56:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:56:10,324 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 133 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1067 [2022-01-31 17:56:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:10,325 INFO L225 Difference]: With dead ends: 2015 [2022-01-31 17:56:10,325 INFO L226 Difference]: Without dead ends: 1080 [2022-01-31 17:56:10,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:56:10,328 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 4149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 5416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4149 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:10,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 88 Invalid, 5416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4149 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:56:10,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-01-31 17:56:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2022-01-31 17:56:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1074 states have (on average 1.0083798882681565) internal successors, (1083), 1074 states have internal predecessors, (1083), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1088 transitions. [2022-01-31 17:56:10,345 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1088 transitions. Word has length 1067 [2022-01-31 17:56:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:10,345 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1088 transitions. [2022-01-31 17:56:10,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 133 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:10,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1088 transitions. [2022-01-31 17:56:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1076 [2022-01-31 17:56:10,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:10,352 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:10,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:56:10,352 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:10,352 INFO L85 PathProgramCache]: Analyzing trace with hash 585215911, now seen corresponding path program 131 times [2022-01-31 17:56:10,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:10,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82291260] [2022-01-31 17:56:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:10,353 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:10,353 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:10,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:10,467 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:15,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:15,097 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 17:56:15,097 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:15,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82291260] [2022-01-31 17:56:15,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [82291260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:15,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:15,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:56:15,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568501806] [2022-01-31 17:56:15,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:15,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:56:15,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:15,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:56:15,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:56:15,101 INFO L87 Difference]: Start difference. First operand 1080 states and 1088 transitions. Second operand has 135 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 134 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:26,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:26,439 INFO L93 Difference]: Finished difference Result 2030 states and 2053 transitions. [2022-01-31 17:56:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:56:26,440 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 134 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 1075 [2022-01-31 17:56:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:26,440 INFO L225 Difference]: With dead ends: 2030 [2022-01-31 17:56:26,441 INFO L226 Difference]: Without dead ends: 1088 [2022-01-31 17:56:26,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:56:26,444 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 4997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 6196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4997 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:26,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 6196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4997 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:56:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-01-31 17:56:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1088. [2022-01-31 17:56:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1082 states have (on average 1.0083179297597042) internal successors, (1091), 1082 states have internal predecessors, (1091), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:26,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1096 transitions. [2022-01-31 17:56:26,460 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1096 transitions. Word has length 1075 [2022-01-31 17:56:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:26,460 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1096 transitions. [2022-01-31 17:56:26,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 134 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:26,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1096 transitions. [2022-01-31 17:56:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1084 [2022-01-31 17:56:26,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:26,468 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:26,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:56:26,468 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1652689323, now seen corresponding path program 132 times [2022-01-31 17:56:26,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:26,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883243678] [2022-01-31 17:56:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:26,469 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:26,469 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:26,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:26,546 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:31,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:31,694 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883243678] [2022-01-31 17:56:31,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [883243678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:31,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:31,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:56:31,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487129705] [2022-01-31 17:56:31,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:31,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:56:31,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:31,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:56:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:56:31,699 INFO L87 Difference]: Start difference. First operand 1088 states and 1096 transitions. Second operand has 136 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 135 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:43,286 INFO L93 Difference]: Finished difference Result 2045 states and 2068 transitions. [2022-01-31 17:56:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:56:43,287 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 135 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1083 [2022-01-31 17:56:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:43,288 INFO L225 Difference]: With dead ends: 2045 [2022-01-31 17:56:43,288 INFO L226 Difference]: Without dead ends: 1096 [2022-01-31 17:56:43,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:56:43,291 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 5230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5230 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:43,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 6380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5230 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:56:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-01-31 17:56:43,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1096. [2022-01-31 17:56:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1090 states have (on average 1.008256880733945) internal successors, (1099), 1090 states have internal predecessors, (1099), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1104 transitions. [2022-01-31 17:56:43,311 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1104 transitions. Word has length 1083 [2022-01-31 17:56:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:43,311 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1104 transitions. [2022-01-31 17:56:43,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 135 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1104 transitions. [2022-01-31 17:56:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1092 [2022-01-31 17:56:43,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:43,318 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:43,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:56:43,318 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:43,319 INFO L85 PathProgramCache]: Analyzing trace with hash -885660121, now seen corresponding path program 133 times [2022-01-31 17:56:43,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:43,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136248035] [2022-01-31 17:56:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:43,321 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:43,321 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:43,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:43,403 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:48,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:48,472 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:48,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136248035] [2022-01-31 17:56:48,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [136248035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:48,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:48,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:56:48,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323362236] [2022-01-31 17:56:48,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:48,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:56:48,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:56:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:56:48,475 INFO L87 Difference]: Start difference. First operand 1096 states and 1104 transitions. Second operand has 137 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 136 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:00,023 INFO L93 Difference]: Finished difference Result 2060 states and 2083 transitions. [2022-01-31 17:57:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:57:00,023 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 136 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 1091 [2022-01-31 17:57:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:00,024 INFO L225 Difference]: With dead ends: 2060 [2022-01-31 17:57:00,024 INFO L226 Difference]: Without dead ends: 1104 [2022-01-31 17:57:00,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:57:00,027 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 6449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 7569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6449 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:00,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 7569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6449 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:57:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-01-31 17:57:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2022-01-31 17:57:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1098 states have (on average 1.0081967213114753) internal successors, (1107), 1098 states have internal predecessors, (1107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1112 transitions. [2022-01-31 17:57:00,044 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1112 transitions. Word has length 1091 [2022-01-31 17:57:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:00,044 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1112 transitions. [2022-01-31 17:57:00,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 136 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1112 transitions. [2022-01-31 17:57:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2022-01-31 17:57:00,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:00,052 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:00,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:57:00,052 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:00,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1360122837, now seen corresponding path program 134 times [2022-01-31 17:57:00,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:00,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749086757] [2022-01-31 17:57:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:00,053 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:00,053 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:00,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:00,127 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:04,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:04,714 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:04,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749086757] [2022-01-31 17:57:04,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749086757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:04,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:04,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:57:04,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346241173] [2022-01-31 17:57:04,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:04,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:57:04,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:04,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:57:04,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:57:04,717 INFO L87 Difference]: Start difference. First operand 1104 states and 1112 transitions. Second operand has 138 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 137 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:16,288 INFO L93 Difference]: Finished difference Result 2075 states and 2098 transitions. [2022-01-31 17:57:16,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:57:16,288 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 137 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1099 [2022-01-31 17:57:16,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:16,291 INFO L225 Difference]: With dead ends: 2075 [2022-01-31 17:57:16,291 INFO L226 Difference]: Without dead ends: 1112 [2022-01-31 17:57:16,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:57:16,294 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 5694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5694 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:16,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 6860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5694 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:57:16,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-01-31 17:57:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2022-01-31 17:57:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1106 states have (on average 1.0081374321880652) internal successors, (1115), 1106 states have internal predecessors, (1115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1120 transitions. [2022-01-31 17:57:16,311 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1120 transitions. Word has length 1099 [2022-01-31 17:57:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:16,311 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1120 transitions. [2022-01-31 17:57:16,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 137 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:16,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1120 transitions. [2022-01-31 17:57:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1108 [2022-01-31 17:57:16,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:16,319 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:16,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:57:16,319 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:16,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:16,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1688781657, now seen corresponding path program 135 times [2022-01-31 17:57:16,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:16,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181427972] [2022-01-31 17:57:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:16,320 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:16,320 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:16,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:16,419 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:22,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:22,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:22,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181427972] [2022-01-31 17:57:22,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [181427972] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:22,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:22,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:57:22,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968111450] [2022-01-31 17:57:22,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:22,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:57:22,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:22,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:57:22,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:57:22,708 INFO L87 Difference]: Start difference. First operand 1112 states and 1120 transitions. Second operand has 139 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 138 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:36,894 INFO L93 Difference]: Finished difference Result 2090 states and 2113 transitions. [2022-01-31 17:57:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 17:57:36,894 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 138 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 1107 [2022-01-31 17:57:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:36,895 INFO L225 Difference]: With dead ends: 2090 [2022-01-31 17:57:36,895 INFO L226 Difference]: Without dead ends: 1120 [2022-01-31 17:57:36,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 17:57:36,898 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 5140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5140 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:36,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 6314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5140 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:57:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-01-31 17:57:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1120. [2022-01-31 17:57:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1114 states have (on average 1.0080789946140036) internal successors, (1123), 1114 states have internal predecessors, (1123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1128 transitions. [2022-01-31 17:57:36,915 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1128 transitions. Word has length 1107 [2022-01-31 17:57:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:36,915 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1128 transitions. [2022-01-31 17:57:36,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 138 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1128 transitions. [2022-01-31 17:57:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1116 [2022-01-31 17:57:36,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:36,923 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 136, 136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:36,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 17:57:36,923 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:36,923 INFO L85 PathProgramCache]: Analyzing trace with hash -452940117, now seen corresponding path program 136 times [2022-01-31 17:57:36,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:36,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528143138] [2022-01-31 17:57:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:36,924 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:36,924 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:36,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:37,002 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:43,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:43,537 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:43,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528143138] [2022-01-31 17:57:43,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [528143138] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:43,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:43,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 17:57:43,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580543561] [2022-01-31 17:57:43,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:43,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 17:57:43,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:43,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 17:57:43,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:57:43,541 INFO L87 Difference]: Start difference. First operand 1120 states and 1128 transitions. Second operand has 140 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 139 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:58,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:58,765 INFO L93 Difference]: Finished difference Result 2105 states and 2128 transitions. [2022-01-31 17:57:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 17:57:58,766 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 139 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1115 [2022-01-31 17:57:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:58,767 INFO L225 Difference]: With dead ends: 2105 [2022-01-31 17:57:58,767 INFO L226 Difference]: Without dead ends: 1128 [2022-01-31 17:57:58,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 17:57:58,770 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 6059 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 7203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6059 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:58,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 7203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6059 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 17:57:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-01-31 17:57:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1128. [2022-01-31 17:57:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1122 states have (on average 1.0080213903743316) internal successors, (1131), 1122 states have internal predecessors, (1131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1136 transitions. [2022-01-31 17:57:58,787 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1136 transitions. Word has length 1115 [2022-01-31 17:57:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:58,787 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1136 transitions. [2022-01-31 17:57:58,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 139 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1136 transitions. [2022-01-31 17:57:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1124 [2022-01-31 17:57:58,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:58,795 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 137, 137, 137, 137, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:58,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 17:57:58,795 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:58,796 INFO L85 PathProgramCache]: Analyzing trace with hash -253381849, now seen corresponding path program 137 times [2022-01-31 17:57:58,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:58,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295358913] [2022-01-31 17:57:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:58,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:58,797 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:58,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:58,891 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:05,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:05,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:05,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295358913] [2022-01-31 17:58:05,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [295358913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:05,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:05,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 17:58:05,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184284573] [2022-01-31 17:58:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:05,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 17:58:05,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:05,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 17:58:05,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:58:05,500 INFO L87 Difference]: Start difference. First operand 1128 states and 1136 transitions. Second operand has 141 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 140 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:20,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:20,660 INFO L93 Difference]: Finished difference Result 2120 states and 2143 transitions. [2022-01-31 17:58:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 17:58:20,660 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 140 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 1123 [2022-01-31 17:58:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:20,661 INFO L225 Difference]: With dead ends: 2120 [2022-01-31 17:58:20,661 INFO L226 Difference]: Without dead ends: 1136 [2022-01-31 17:58:20,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9590 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 17:58:20,664 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 5107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 6392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5107 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:20,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 78 Invalid, 6392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5107 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:58:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-01-31 17:58:20,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2022-01-31 17:58:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1130 states have (on average 1.0079646017699115) internal successors, (1139), 1130 states have internal predecessors, (1139), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1144 transitions. [2022-01-31 17:58:20,682 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1144 transitions. Word has length 1123 [2022-01-31 17:58:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:20,682 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1144 transitions. [2022-01-31 17:58:20,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 140 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:20,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1144 transitions. [2022-01-31 17:58:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2022-01-31 17:58:20,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:20,690 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 138, 138, 138, 138, 138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:20,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 17:58:20,690 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:20,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1550216917, now seen corresponding path program 138 times [2022-01-31 17:58:20,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:20,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866056832] [2022-01-31 17:58:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:20,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:20,691 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:20,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:20,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:27,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:27,074 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:27,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866056832] [2022-01-31 17:58:27,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [866056832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:27,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:27,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 17:58:27,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843991825] [2022-01-31 17:58:27,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:27,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 17:58:27,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:27,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 17:58:27,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 17:58:27,079 INFO L87 Difference]: Start difference. First operand 1136 states and 1144 transitions. Second operand has 142 states, 142 states have (on average 1.1830985915492958) internal successors, (168), 141 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:40,164 INFO L93 Difference]: Finished difference Result 2135 states and 2158 transitions. [2022-01-31 17:58:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 17:58:40,164 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 1.1830985915492958) internal successors, (168), 141 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1131 [2022-01-31 17:58:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:40,166 INFO L225 Difference]: With dead ends: 2135 [2022-01-31 17:58:40,166 INFO L226 Difference]: Without dead ends: 1144 [2022-01-31 17:58:40,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=29610, Invalid=49070, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 17:58:40,169 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 5117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 6353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5117 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:40,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 6353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5117 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:58:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-01-31 17:58:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1144. [2022-01-31 17:58:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1138 states have (on average 1.007908611599297) internal successors, (1147), 1138 states have internal predecessors, (1147), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1152 transitions. [2022-01-31 17:58:40,187 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1152 transitions. Word has length 1131 [2022-01-31 17:58:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:40,187 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 1152 transitions. [2022-01-31 17:58:40,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 1.1830985915492958) internal successors, (168), 141 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1152 transitions. [2022-01-31 17:58:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1140 [2022-01-31 17:58:40,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:40,195 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 139, 139, 139, 139, 139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:40,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 17:58:40,195 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:40,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:40,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1199655335, now seen corresponding path program 139 times [2022-01-31 17:58:40,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:40,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507400874] [2022-01-31 17:58:40,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:40,196 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:40,196 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:40,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:40,300 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat