/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_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:45:22,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:45:22,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:45:22,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:45:22,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:45:22,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:45:22,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:45:22,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:45:22,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:45:22,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:45:22,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:45:22,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:45:22,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:45:22,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:45:22,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:45:22,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:45:22,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:45:22,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:45:22,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:45:22,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:45:22,308 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 17:45:22,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:45:22,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:45:22,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:45:22,325 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:45:22,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:45:22,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:45:22,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:45:22,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:45:22,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:45:22,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:45:22,326 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:45:22,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:45:22,327 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:45:22,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:45:22,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:45:22,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:45:22,327 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:45:22,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:45:22,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:45:22,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:45:22,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:45:22,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:45:22,328 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:45:22,328 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:45:22,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:45:22,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:45:22,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:45:22,568 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:45:22,569 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:45:22,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2022-01-31 17:45:22,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7c3bf01d/f2216f6403ac4c78b5eef8f9cb2d1702/FLAG635d41868 [2022-01-31 17:45:23,001 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:45:23,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2022-01-31 17:45:23,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7c3bf01d/f2216f6403ac4c78b5eef8f9cb2d1702/FLAG635d41868 [2022-01-31 17:45:23,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7c3bf01d/f2216f6403ac4c78b5eef8f9cb2d1702 [2022-01-31 17:45:23,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:45:23,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:45:23,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:45:23,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:45:23,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:45:23,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:45:23" (1/1) ... [2022-01-31 17:45:23,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d3c13a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:45:23, skipping insertion in model container [2022-01-31 17:45:23,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:45:23" (1/1) ... [2022-01-31 17:45:23,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:45:23,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:45:23,169 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_maxInArray_ground.i[819,832] [2022-01-31 17:45:23,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:45:23,188 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:45:23,199 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_maxInArray_ground.i[819,832] [2022-01-31 17:45:23,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:45:23,219 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:45:23,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:45:23 WrapperNode [2022-01-31 17:45:23,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:45:23,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:45:23,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:45:23,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:45:23,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:45:23" (1/1) ... [2022-01-31 17:45:23,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:45:23" (1/1) ... [2022-01-31 17:45:23,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:45:23" (1/1) ... [2022-01-31 17:45:23,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:45:23" (1/1) ... [2022-01-31 17:45:23,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:45:23" (1/1) ... [2022-01-31 17:45:23,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:45:23" (1/1) ... [2022-01-31 17:45:23,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:45:23" (1/1) ... [2022-01-31 17:45:23,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:45:23,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:45:23,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:45:23,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:45:23,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:45:23" (1/1) ... [2022-01-31 17:45:23,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:45:23,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:45:23,292 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 17:45:23,299 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 17:45:23,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:45:23,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:45:23,325 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:45:23,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:45:23,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:45:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:45:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:45:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:45:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:45:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:45:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:45:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:45:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:45:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:45:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:45:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:45:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:45:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:45:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:45:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:45:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:45:23,409 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:45:23,410 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:45:23,502 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:45:23,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:45:23,507 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 17:45:23,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:45:23 BoogieIcfgContainer [2022-01-31 17:45:23,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:45:23,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:45:23,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:45:23,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:45:23,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:45:23" (1/3) ... [2022-01-31 17:45:23,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d10d1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:45:23, skipping insertion in model container [2022-01-31 17:45:23,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:45:23" (2/3) ... [2022-01-31 17:45:23,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d10d1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:45:23, skipping insertion in model container [2022-01-31 17:45:23,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:45:23" (3/3) ... [2022-01-31 17:45:23,515 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2022-01-31 17:45:23,519 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:45:23,519 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:45:23,565 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:45:23,570 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 17:45:23,571 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:45:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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 17:45:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:45:23,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:23,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:23,588 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:23,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1266308725, now seen corresponding path program 1 times [2022-01-31 17:45:23,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:23,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757699995] [2022-01-31 17:45:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:23,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:23,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:23,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:23,813 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:23,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757699995] [2022-01-31 17:45:23,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1757699995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:23,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:23,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:45:23,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165035837] [2022-01-31 17:45:23,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:23,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:45:23,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:45:23,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:45:23,852 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:23,910 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-01-31 17:45:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:45:23,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 17:45:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:23,928 INFO L225 Difference]: With dead ends: 48 [2022-01-31 17:45:23,928 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 17:45:23,932 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 17:45:23,935 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 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 17:45:23,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 17:45:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-31 17:45:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-31 17:45:23,979 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2022-01-31 17:45:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:23,980 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-31 17:45:23,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-31 17:45:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:45:23,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:23,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:23,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:45:23,982 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:23,984 INFO L85 PathProgramCache]: Analyzing trace with hash -184122438, now seen corresponding path program 1 times [2022-01-31 17:45:23,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:23,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18570409] [2022-01-31 17:45:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:23,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:23,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:24,090 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:24,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18570409] [2022-01-31 17:45:24,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [18570409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:24,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:24,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:45:24,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682957389] [2022-01-31 17:45:24,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:24,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:45:24,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:24,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:45:24,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:45:24,092 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:24,161 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-01-31 17:45:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:45:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 17:45:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:24,163 INFO L225 Difference]: With dead ends: 40 [2022-01-31 17:45:24,163 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 17:45:24,166 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 17:45:24,168 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:24,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:24,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 17:45:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-31 17:45:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-31 17:45:24,179 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2022-01-31 17:45:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:24,181 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-31 17:45:24,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-31 17:45:24,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 17:45:24,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:24,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:24,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:45:24,184 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:24,188 INFO L85 PathProgramCache]: Analyzing trace with hash -960056744, now seen corresponding path program 1 times [2022-01-31 17:45:24,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:24,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012521586] [2022-01-31 17:45:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:24,210 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:24,211 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:24,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:24,213 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:24,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:24,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012521586] [2022-01-31 17:45:24,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1012521586] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:24,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:24,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:45:24,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483175921] [2022-01-31 17:45:24,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:24,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:45:24,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:24,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:45:24,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:45:24,278 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:24,357 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-01-31 17:45:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:45:24,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 17:45:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:24,359 INFO L225 Difference]: With dead ends: 42 [2022-01-31 17:45:24,359 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 17:45:24,360 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 17:45:24,361 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:24,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 30 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:24,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 17:45:24,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-01-31 17:45:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-01-31 17:45:24,370 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2022-01-31 17:45:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:24,370 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-01-31 17:45:24,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-01-31 17:45:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 17:45:24,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:24,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:24,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:45:24,371 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:24,372 INFO L85 PathProgramCache]: Analyzing trace with hash 691384694, now seen corresponding path program 2 times [2022-01-31 17:45:24,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:24,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770750667] [2022-01-31 17:45:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:24,375 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:24,375 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:24,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:24,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:24,420 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770750667] [2022-01-31 17:45:24,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [770750667] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:24,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:24,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:45:24,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819142643] [2022-01-31 17:45:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:24,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:45:24,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:45:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:45:24,422 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:24,464 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-01-31 17:45:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:45:24,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 17:45:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:24,465 INFO L225 Difference]: With dead ends: 40 [2022-01-31 17:45:24,465 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 17:45:24,465 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 17:45:24,466 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:24,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 17:45:24,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-01-31 17:45:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-01-31 17:45:24,472 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2022-01-31 17:45:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:24,472 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-01-31 17:45:24,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-01-31 17:45:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 17:45:24,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:24,473 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:24,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:45:24,473 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:24,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash 683235102, now seen corresponding path program 1 times [2022-01-31 17:45:24,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:24,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794543905] [2022-01-31 17:45:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:24,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:24,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:24,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:24,478 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,523 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 17:45:24,523 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:24,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794543905] [2022-01-31 17:45:24,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1794543905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:24,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:24,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:45:24,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904667877] [2022-01-31 17:45:24,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:24,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:45:24,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:24,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:45:24,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:45:24,525 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:24,583 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-01-31 17:45:24,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:45:24,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 17:45:24,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:24,585 INFO L225 Difference]: With dead ends: 43 [2022-01-31 17:45:24,585 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 17:45:24,585 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 17:45:24,586 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:24,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 34 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 17:45:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-01-31 17:45:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 17:45:24,592 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2022-01-31 17:45:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:24,592 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 17:45:24,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 17:45:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:45:24,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:24,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:24,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:45:24,594 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:24,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1583091594, now seen corresponding path program 2 times [2022-01-31 17:45:24,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:24,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991764747] [2022-01-31 17:45:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:24,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:24,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:24,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:24,598 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,648 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 17:45:24,649 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:24,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991764747] [2022-01-31 17:45:24,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991764747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:24,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:24,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:45:24,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986941700] [2022-01-31 17:45:24,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:24,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:45:24,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:24,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:45:24,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:45:24,651 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:24,714 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-01-31 17:45:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:45:24,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 17:45:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:24,715 INFO L225 Difference]: With dead ends: 52 [2022-01-31 17:45:24,715 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 17:45:24,715 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 17:45:24,716 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:24,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 17:45:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-31 17:45:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-01-31 17:45:24,723 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2022-01-31 17:45:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:24,723 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-01-31 17:45:24,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-01-31 17:45:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:45:24,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:24,724 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:24,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:45:24,725 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:24,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1084813716, now seen corresponding path program 3 times [2022-01-31 17:45:24,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:24,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295825672] [2022-01-31 17:45:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:24,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:24,728 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:24,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:24,730 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:24,794 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:24,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295825672] [2022-01-31 17:45:24,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [295825672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:24,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:24,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:45:24,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26103486] [2022-01-31 17:45:24,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:24,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:45:24,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:45:24,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:45:24,796 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:24,892 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-01-31 17:45:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:45:24,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 17:45:24,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:24,895 INFO L225 Difference]: With dead ends: 54 [2022-01-31 17:45:24,895 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 17:45:24,896 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 17:45:24,896 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:24,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 45 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 17:45:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-01-31 17:45:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-01-31 17:45:24,910 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2022-01-31 17:45:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:24,910 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-01-31 17:45:24,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-01-31 17:45:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 17:45:24,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:24,912 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:24,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:45:24,912 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:24,913 INFO L85 PathProgramCache]: Analyzing trace with hash 846340914, now seen corresponding path program 4 times [2022-01-31 17:45:24,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:24,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92390957] [2022-01-31 17:45:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:24,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:24,926 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:24,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:24,933 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:25,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:25,031 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 17:45:25,032 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:25,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92390957] [2022-01-31 17:45:25,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [92390957] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:25,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:25,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:45:25,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21172204] [2022-01-31 17:45:25,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:25,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:45:25,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:25,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:45:25,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:45:25,046 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:25,134 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-01-31 17:45:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:45:25,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 17:45:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:25,136 INFO L225 Difference]: With dead ends: 56 [2022-01-31 17:45:25,136 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 17:45:25,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:45:25,138 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:25,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 35 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 17:45:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-31 17:45:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 17:45:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-31 17:45:25,150 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2022-01-31 17:45:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:25,152 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-31 17:45:25,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-31 17:45:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 17:45:25,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:25,155 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:25,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:45:25,156 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash -692755120, now seen corresponding path program 5 times [2022-01-31 17:45:25,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:25,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971709643] [2022-01-31 17:45:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:25,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:25,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:25,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:25,163 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:25,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:25,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:25,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971709643] [2022-01-31 17:45:25,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971709643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:25,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:25,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:45:25,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571727962] [2022-01-31 17:45:25,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:25,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:45:25,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:25,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:45:25,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:45:25,257 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:25,364 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-01-31 17:45:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:45:25,365 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 17:45:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:25,366 INFO L225 Difference]: With dead ends: 58 [2022-01-31 17:45:25,366 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 17:45:25,367 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 17:45:25,368 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:25,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 40 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 17:45:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-01-31 17:45:25,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-01-31 17:45:25,387 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 31 [2022-01-31 17:45:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:25,387 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-01-31 17:45:25,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-01-31 17:45:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 17:45:25,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:25,391 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:25,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:45:25,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1999673326, now seen corresponding path program 6 times [2022-01-31 17:45:25,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:25,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527667561] [2022-01-31 17:45:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:25,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:25,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:25,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:25,401 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:25,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:25,479 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:25,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527667561] [2022-01-31 17:45:25,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [527667561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:25,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:25,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:45:25,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571650359] [2022-01-31 17:45:25,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:25,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:45:25,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:25,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:45:25,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:45:25,481 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:25,600 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-01-31 17:45:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:45:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 17:45:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:25,601 INFO L225 Difference]: With dead ends: 60 [2022-01-31 17:45:25,601 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 17:45:25,602 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 17:45:25,602 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:25,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 17:45:25,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-01-31 17:45:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-01-31 17:45:25,608 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 33 [2022-01-31 17:45:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:25,608 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-01-31 17:45:25,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-01-31 17:45:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:45:25,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:25,609 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:25,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:45:25,609 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash -441869556, now seen corresponding path program 7 times [2022-01-31 17:45:25,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:25,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245494907] [2022-01-31 17:45:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:25,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:25,612 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:25,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:25,613 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:25,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:25,725 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:25,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245494907] [2022-01-31 17:45:25,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [245494907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:25,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:25,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:45:25,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254884487] [2022-01-31 17:45:25,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:25,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:45:25,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:25,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:45:25,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:45:25,726 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:25,844 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-01-31 17:45:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:45:25,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 17:45:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:25,845 INFO L225 Difference]: With dead ends: 62 [2022-01-31 17:45:25,845 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 17:45:25,846 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 17:45:25,846 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:25,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 35 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 17:45:25,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-01-31 17:45:25,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-01-31 17:45:25,852 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 35 [2022-01-31 17:45:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:25,852 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-01-31 17:45:25,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,853 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-01-31 17:45:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 17:45:25,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:25,853 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:25,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:45:25,854 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:25,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:25,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1712435542, now seen corresponding path program 8 times [2022-01-31 17:45:25,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:25,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502462692] [2022-01-31 17:45:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:25,856 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:25,856 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:25,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:25,857 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:25,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:25,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:25,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502462692] [2022-01-31 17:45:25,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [502462692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:25,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:25,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:45:25,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704351534] [2022-01-31 17:45:25,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:25,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:45:25,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:25,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:45:25,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:45:25,945 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:26,087 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-01-31 17:45:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:45:26,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 17:45:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:26,088 INFO L225 Difference]: With dead ends: 64 [2022-01-31 17:45:26,088 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 17:45:26,089 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 17:45:26,089 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:26,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 45 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:26,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 17:45:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-01-31 17:45:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 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 17:45:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-01-31 17:45:26,095 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2022-01-31 17:45:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:26,095 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-01-31 17:45:26,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-01-31 17:45:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:45:26,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:26,096 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:26,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:45:26,096 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:26,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:26,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1339331272, now seen corresponding path program 9 times [2022-01-31 17:45:26,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:26,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154380552] [2022-01-31 17:45:26,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:26,099 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:26,099 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:26,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:26,100 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:26,192 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154380552] [2022-01-31 17:45:26,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154380552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:26,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:26,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:45:26,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374117922] [2022-01-31 17:45:26,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:26,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:45:26,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:26,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:45:26,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:45:26,193 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 17:45:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:26,341 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-01-31 17:45:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:45:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 39 [2022-01-31 17:45:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:26,342 INFO L225 Difference]: With dead ends: 66 [2022-01-31 17:45:26,342 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 17:45:26,343 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 17:45:26,343 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:26,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 30 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 17:45:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-01-31 17:45:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-01-31 17:45:26,349 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-01-31 17:45:26,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:26,349 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-01-31 17:45:26,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 17:45:26,349 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-01-31 17:45:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 17:45:26,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:26,350 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:26,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:45:26,350 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash 624576358, now seen corresponding path program 10 times [2022-01-31 17:45:26,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:26,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095383701] [2022-01-31 17:45:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:26,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:26,352 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:26,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:26,353 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:26,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:26,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095383701] [2022-01-31 17:45:26,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095383701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:26,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:26,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:45:26,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140828386] [2022-01-31 17:45:26,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:26,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:45:26,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:26,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:45:26,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:45:26,461 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 17:45:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:26,645 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-01-31 17:45:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:45:26,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 41 [2022-01-31 17:45:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:26,646 INFO L225 Difference]: With dead ends: 68 [2022-01-31 17:45:26,646 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 17:45:26,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:45:26,647 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:26,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 17:45:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-01-31 17:45:26,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-01-31 17:45:26,654 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 41 [2022-01-31 17:45:26,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:26,654 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-01-31 17:45:26,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 17:45:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-01-31 17:45:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:45:26,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:26,654 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:26,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:45:26,655 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:26,655 INFO L85 PathProgramCache]: Analyzing trace with hash 939871364, now seen corresponding path program 11 times [2022-01-31 17:45:26,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:26,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579656830] [2022-01-31 17:45:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:26,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:26,657 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:26,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:26,658 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:26,769 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:26,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579656830] [2022-01-31 17:45:26,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1579656830] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:26,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:26,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:45:26,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489147346] [2022-01-31 17:45:26,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:26,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:45:26,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:26,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:45:26,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:45:26,770 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 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 17:45:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:26,944 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2022-01-31 17:45:26,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:45:26,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 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 43 [2022-01-31 17:45:26,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:26,946 INFO L225 Difference]: With dead ends: 70 [2022-01-31 17:45:26,946 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 17:45:26,950 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 17:45:26,951 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:26,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 55 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 17:45:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-01-31 17:45:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-01-31 17:45:26,960 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 43 [2022-01-31 17:45:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:26,960 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-01-31 17:45:26,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 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 17:45:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-01-31 17:45:26,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 17:45:26,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:26,961 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:26,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:45:26,961 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1004305886, now seen corresponding path program 12 times [2022-01-31 17:45:26,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:26,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351085006] [2022-01-31 17:45:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:26,966 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:26,966 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:26,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:26,967 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:27,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:27,106 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:27,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351085006] [2022-01-31 17:45:27,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1351085006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:27,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:27,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:45:27,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909507611] [2022-01-31 17:45:27,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:27,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:45:27,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:45:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:45:27,108 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 17:45:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:27,275 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2022-01-31 17:45:27,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:45:27,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 45 [2022-01-31 17:45:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:27,276 INFO L225 Difference]: With dead ends: 72 [2022-01-31 17:45:27,276 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 17:45:27,276 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 17:45:27,277 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:27,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 35 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:45:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 17:45:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-01-31 17:45:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 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 17:45:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-01-31 17:45:27,285 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 45 [2022-01-31 17:45:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:27,285 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-01-31 17:45:27,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 17:45:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-01-31 17:45:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:45:27,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:27,286 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:27,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:45:27,286 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1047869376, now seen corresponding path program 13 times [2022-01-31 17:45:27,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:27,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293666729] [2022-01-31 17:45:27,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:27,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:27,289 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:27,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:27,291 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:27,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:27,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:27,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293666729] [2022-01-31 17:45:27,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1293666729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:27,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:27,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:45:27,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112990977] [2022-01-31 17:45:27,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:27,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:45:27,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:45:27,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:45:27,443 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 17:45:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:27,671 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2022-01-31 17:45:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:45:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 47 [2022-01-31 17:45:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:27,672 INFO L225 Difference]: With dead ends: 74 [2022-01-31 17:45:27,672 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 17:45:27,673 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 17:45:27,673 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:27,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 40 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 17:45:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-01-31 17:45:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-01-31 17:45:27,681 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 47 [2022-01-31 17:45:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:27,682 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-01-31 17:45:27,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 17:45:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-01-31 17:45:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 17:45:27,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:27,682 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:27,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:45:27,683 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash 37289694, now seen corresponding path program 14 times [2022-01-31 17:45:27,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:27,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477211795] [2022-01-31 17:45:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:27,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:27,686 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:27,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:27,687 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:27,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:27,868 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:27,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477211795] [2022-01-31 17:45:27,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [477211795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:27,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:27,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:45:27,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959620739] [2022-01-31 17:45:27,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:27,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:45:27,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:27,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:45:27,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:45:27,870 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 17:45:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:28,112 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-01-31 17:45:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:45:28,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 49 [2022-01-31 17:45:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:28,113 INFO L225 Difference]: With dead ends: 76 [2022-01-31 17:45:28,113 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 17:45:28,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:45:28,114 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 49 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:28,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 45 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 17:45:28,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-01-31 17:45:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-01-31 17:45:28,120 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2022-01-31 17:45:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:28,120 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-01-31 17:45:28,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 17:45:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-01-31 17:45:28,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:45:28,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:28,121 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:28,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:45:28,121 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:28,121 INFO L85 PathProgramCache]: Analyzing trace with hash -801896964, now seen corresponding path program 15 times [2022-01-31 17:45:28,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:28,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660606476] [2022-01-31 17:45:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:28,123 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:28,123 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:28,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:28,125 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:28,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:28,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:28,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660606476] [2022-01-31 17:45:28,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1660606476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:28,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:28,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:45:28,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968173392] [2022-01-31 17:45:28,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:28,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:45:28,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:45:28,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:45:28,306 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 17:45:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:28,555 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-01-31 17:45:28,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:45:28,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 51 [2022-01-31 17:45:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:28,556 INFO L225 Difference]: With dead ends: 78 [2022-01-31 17:45:28,556 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 17:45:28,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:45:28,557 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:28,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 35 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 17:45:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-31 17:45:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-01-31 17:45:28,564 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 51 [2022-01-31 17:45:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:28,564 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-01-31 17:45:28,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 17:45:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-01-31 17:45:28,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:45:28,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:28,565 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:28,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:45:28,565 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:28,566 INFO L85 PathProgramCache]: Analyzing trace with hash 193576346, now seen corresponding path program 16 times [2022-01-31 17:45:28,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:28,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736146946] [2022-01-31 17:45:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:28,568 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:28,568 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:28,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:28,569 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:28,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:28,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:28,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736146946] [2022-01-31 17:45:28,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736146946] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:28,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:28,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:45:28,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403194133] [2022-01-31 17:45:28,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:28,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:45:28,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:28,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:45:28,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:45:28,755 INFO L87 Difference]: Start difference. First operand 58 states and 62 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 17:45:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:29,025 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2022-01-31 17:45:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:45:29,026 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 53 [2022-01-31 17:45:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:29,026 INFO L225 Difference]: With dead ends: 80 [2022-01-31 17:45:29,026 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 17:45:29,027 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 17:45:29,027 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:29,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 40 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:29,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 17:45:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-01-31 17:45:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 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 17:45:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-01-31 17:45:29,036 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 53 [2022-01-31 17:45:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:29,036 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-01-31 17:45:29,036 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 17:45:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-01-31 17:45:29,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:45:29,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:29,037 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:29,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:45:29,037 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:29,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:29,037 INFO L85 PathProgramCache]: Analyzing trace with hash -934279752, now seen corresponding path program 17 times [2022-01-31 17:45:29,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:29,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115958544] [2022-01-31 17:45:29,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:29,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:29,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:29,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:29,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:29,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:29,261 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:29,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115958544] [2022-01-31 17:45:29,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1115958544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:29,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:29,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:45:29,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159339265] [2022-01-31 17:45:29,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:29,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:45:29,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:29,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:45:29,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:45:29,263 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 17:45:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:29,552 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2022-01-31 17:45:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:45:29,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 55 [2022-01-31 17:45:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:29,553 INFO L225 Difference]: With dead ends: 82 [2022-01-31 17:45:29,553 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 17:45:29,554 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 17:45:29,554 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:29,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 45 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 17:45:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-01-31 17:45:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-01-31 17:45:29,563 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 55 [2022-01-31 17:45:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:29,563 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-01-31 17:45:29,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 17:45:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-01-31 17:45:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:45:29,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:29,564 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:29,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:45:29,564 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:29,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1822735958, now seen corresponding path program 18 times [2022-01-31 17:45:29,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:29,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397747481] [2022-01-31 17:45:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:29,567 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:29,567 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:29,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:29,568 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:29,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:29,769 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397747481] [2022-01-31 17:45:29,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [397747481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:29,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:29,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:45:29,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078882411] [2022-01-31 17:45:29,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:29,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:45:29,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:29,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:45:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:45:29,781 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 17:45:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:30,068 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2022-01-31 17:45:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:45:30,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 57 [2022-01-31 17:45:30,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:30,070 INFO L225 Difference]: With dead ends: 84 [2022-01-31 17:45:30,070 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 17:45:30,071 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 17:45:30,072 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:30,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 40 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 17:45:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-01-31 17:45:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-01-31 17:45:30,078 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 57 [2022-01-31 17:45:30,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:30,078 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-01-31 17:45:30,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 17:45:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-01-31 17:45:30,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:45:30,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:30,079 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:30,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:45:30,079 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:30,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:30,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1320011636, now seen corresponding path program 19 times [2022-01-31 17:45:30,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:30,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249328517] [2022-01-31 17:45:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:30,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:30,082 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:30,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:30,083 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:30,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:30,312 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:30,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249328517] [2022-01-31 17:45:30,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [249328517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:30,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:30,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:45:30,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350797217] [2022-01-31 17:45:30,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:30,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:45:30,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:45:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:45:30,314 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 17:45:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:30,656 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2022-01-31 17:45:30,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:45:30,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 59 [2022-01-31 17:45:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:30,657 INFO L225 Difference]: With dead ends: 86 [2022-01-31 17:45:30,658 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 17:45:30,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:45:30,659 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:30,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 40 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 17:45:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-01-31 17:45:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-01-31 17:45:30,667 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2022-01-31 17:45:30,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:30,668 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-01-31 17:45:30,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 17:45:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-01-31 17:45:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 17:45:30,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:30,668 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:30,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:45:30,668 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:30,669 INFO L85 PathProgramCache]: Analyzing trace with hash -761724654, now seen corresponding path program 20 times [2022-01-31 17:45:30,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:30,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328941287] [2022-01-31 17:45:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:30,671 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:30,671 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:30,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:30,673 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:30,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:30,910 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:30,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328941287] [2022-01-31 17:45:30,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [328941287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:30,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:30,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:45:30,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163413918] [2022-01-31 17:45:30,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:30,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:45:30,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:45:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:45:30,914 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 17:45:31,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:31,259 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-01-31 17:45:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:45:31,260 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 61 [2022-01-31 17:45:31,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:31,260 INFO L225 Difference]: With dead ends: 88 [2022-01-31 17:45:31,260 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 17:45:31,261 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 17:45:31,262 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 61 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:31,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 45 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:31,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 17:45:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-01-31 17:45:31,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 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 17:45:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-01-31 17:45:31,270 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 61 [2022-01-31 17:45:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:31,271 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-01-31 17:45:31,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 17:45:31,271 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-01-31 17:45:31,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:45:31,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:31,271 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:31,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:45:31,272 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash 144460592, now seen corresponding path program 21 times [2022-01-31 17:45:31,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:31,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936353361] [2022-01-31 17:45:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:31,274 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:31,274 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:31,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:31,275 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:31,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:31,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:31,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936353361] [2022-01-31 17:45:31,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1936353361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:31,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:31,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:45:31,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090820146] [2022-01-31 17:45:31,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:31,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:45:31,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:31,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:45:31,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:45:31,561 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 17:45:31,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:31,944 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2022-01-31 17:45:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:45:31,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 63 [2022-01-31 17:45:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:31,945 INFO L225 Difference]: With dead ends: 90 [2022-01-31 17:45:31,945 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 17:45:31,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:45:31,946 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:31,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 40 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 17:45:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-01-31 17:45:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.078125) internal successors, (69), 64 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-01-31 17:45:31,955 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 63 [2022-01-31 17:45:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:31,955 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-01-31 17:45:31,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 17:45:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-01-31 17:45:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:45:31,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:31,958 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:31,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:45:31,958 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:31,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash -889879090, now seen corresponding path program 22 times [2022-01-31 17:45:31,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:31,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259519777] [2022-01-31 17:45:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:31,960 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:31,960 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:31,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:31,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:32,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:32,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:32,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259519777] [2022-01-31 17:45:32,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [259519777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:32,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:32,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:45:32,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875739988] [2022-01-31 17:45:32,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:32,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:45:32,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:32,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:45:32,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:45:32,277 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 17:45:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:32,685 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-01-31 17:45:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:45:32,686 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 65 [2022-01-31 17:45:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:32,686 INFO L225 Difference]: With dead ends: 92 [2022-01-31 17:45:32,686 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 17:45:32,687 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 17:45:32,688 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:32,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 45 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 17:45:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-01-31 17:45:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-01-31 17:45:32,697 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 65 [2022-01-31 17:45:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:32,697 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-01-31 17:45:32,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 17:45:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-01-31 17:45:32,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:45:32,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:32,698 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:32,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:45:32,698 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:32,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:32,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1542099180, now seen corresponding path program 23 times [2022-01-31 17:45:32,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:32,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730925477] [2022-01-31 17:45:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:32,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:32,701 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:32,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:32,702 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:33,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:33,035 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:33,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730925477] [2022-01-31 17:45:33,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [730925477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:33,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:33,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:45:33,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812996951] [2022-01-31 17:45:33,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:33,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:45:33,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:33,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:45:33,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:45:33,038 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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 17:45:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:33,450 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-01-31 17:45:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:45:33,451 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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 67 [2022-01-31 17:45:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:33,451 INFO L225 Difference]: With dead ends: 94 [2022-01-31 17:45:33,451 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 17:45:33,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:45:33,453 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:33,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 45 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:33,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 17:45:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-01-31 17:45:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-01-31 17:45:33,462 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 67 [2022-01-31 17:45:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:33,463 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-01-31 17:45:33,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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 17:45:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-01-31 17:45:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 17:45:33,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:33,463 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:33,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:45:33,464 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2083959670, now seen corresponding path program 24 times [2022-01-31 17:45:33,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:33,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990446285] [2022-01-31 17:45:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:33,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:33,466 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:33,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:33,467 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:33,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:33,782 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:33,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990446285] [2022-01-31 17:45:33,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1990446285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:33,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:33,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:45:33,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080508313] [2022-01-31 17:45:33,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:33,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:45:33,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:33,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:45:33,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:45:33,784 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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 17:45:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:34,241 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-01-31 17:45:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:45:34,242 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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 69 [2022-01-31 17:45:34,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:34,242 INFO L225 Difference]: With dead ends: 96 [2022-01-31 17:45:34,242 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 17:45:34,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:45:34,244 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:34,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 60 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:34,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 17:45:34,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-01-31 17:45:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 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 17:45:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-01-31 17:45:34,253 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2022-01-31 17:45:34,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:34,253 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-01-31 17:45:34,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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 17:45:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-01-31 17:45:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:45:34,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:34,254 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:34,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:45:34,254 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:34,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:34,254 INFO L85 PathProgramCache]: Analyzing trace with hash 786929832, now seen corresponding path program 25 times [2022-01-31 17:45:34,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:34,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779801698] [2022-01-31 17:45:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:34,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:34,256 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:34,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:34,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:34,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:34,584 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:34,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779801698] [2022-01-31 17:45:34,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1779801698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:34,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:34,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:45:34,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617805976] [2022-01-31 17:45:34,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:34,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:45:34,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:45:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:45:34,586 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 17:45:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:35,066 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-01-31 17:45:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:45:35,067 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 71 [2022-01-31 17:45:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:35,067 INFO L225 Difference]: With dead ends: 98 [2022-01-31 17:45:35,067 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 17:45:35,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:45:35,069 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:35,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 55 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 17:45:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-01-31 17:45:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-01-31 17:45:35,082 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 71 [2022-01-31 17:45:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:35,082 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-01-31 17:45:35,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 17:45:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-01-31 17:45:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:45:35,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:35,083 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:35,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:45:35,083 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1952230074, now seen corresponding path program 26 times [2022-01-31 17:45:35,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:35,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436776199] [2022-01-31 17:45:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:35,085 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:35,085 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:35,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:35,087 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:35,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:35,469 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436776199] [2022-01-31 17:45:35,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436776199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:35,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:35,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:45:35,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876796609] [2022-01-31 17:45:35,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:35,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:45:35,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:45:35,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:45:35,471 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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 17:45:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:35,971 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2022-01-31 17:45:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:45:35,972 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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 73 [2022-01-31 17:45:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:35,973 INFO L225 Difference]: With dead ends: 100 [2022-01-31 17:45:35,973 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 17:45:35,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:45:35,974 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:35,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 40 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 17:45:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-01-31 17:45:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-01-31 17:45:35,984 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 73 [2022-01-31 17:45:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:35,984 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-01-31 17:45:35,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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 17:45:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-01-31 17:45:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:45:35,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:35,985 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:35,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:45:35,985 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:35,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:35,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1469947292, now seen corresponding path program 27 times [2022-01-31 17:45:35,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:35,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603472396] [2022-01-31 17:45:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:35,988 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:35,988 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:35,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:35,989 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:36,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:36,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:36,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603472396] [2022-01-31 17:45:36,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [603472396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:36,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:36,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:45:36,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594541677] [2022-01-31 17:45:36,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:36,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:45:36,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:36,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:45:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:45:36,356 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 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 17:45:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:36,930 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2022-01-31 17:45:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:45:36,930 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 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 75 [2022-01-31 17:45:36,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:36,931 INFO L225 Difference]: With dead ends: 102 [2022-01-31 17:45:36,931 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 17:45:36,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:45:36,932 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:36,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 55 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 17:45:36,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-01-31 17:45:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-01-31 17:45:36,941 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 75 [2022-01-31 17:45:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:36,941 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-01-31 17:45:36,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 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 17:45:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-01-31 17:45:36,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:45:36,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:36,942 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:36,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:45:36,942 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1852661758, now seen corresponding path program 28 times [2022-01-31 17:45:36,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:36,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012983924] [2022-01-31 17:45:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:36,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:36,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:36,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:36,946 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:37,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:37,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:37,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012983924] [2022-01-31 17:45:37,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012983924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:37,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:37,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:45:37,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180283976] [2022-01-31 17:45:37,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:37,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:45:37,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:45:37,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:45:37,327 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 17:45:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:37,846 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2022-01-31 17:45:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:45:37,847 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 77 [2022-01-31 17:45:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:37,847 INFO L225 Difference]: With dead ends: 104 [2022-01-31 17:45:37,847 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 17:45:37,848 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 17:45:37,848 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:37,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 45 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 17:45:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-01-31 17:45:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 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 17:45:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-01-31 17:45:37,860 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 77 [2022-01-31 17:45:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:37,860 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-01-31 17:45:37,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 17:45:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-01-31 17:45:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 17:45:37,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:37,861 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:37,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:45:37,861 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash -274076128, now seen corresponding path program 29 times [2022-01-31 17:45:37,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:37,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919452122] [2022-01-31 17:45:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:37,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:37,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:37,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:37,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:38,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:38,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:38,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919452122] [2022-01-31 17:45:38,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [919452122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:38,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:38,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:45:38,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955101271] [2022-01-31 17:45:38,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:38,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:45:38,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:45:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:45:38,278 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 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 17:45:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:38,845 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2022-01-31 17:45:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:45:38,845 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 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 79 [2022-01-31 17:45:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:38,847 INFO L225 Difference]: With dead ends: 106 [2022-01-31 17:45:38,847 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 17:45:38,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:45:38,851 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 79 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:38,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 35 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 17:45:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-01-31 17:45:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.0625) internal successors, (85), 80 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-01-31 17:45:38,860 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 79 [2022-01-31 17:45:38,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:38,860 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-01-31 17:45:38,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 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 17:45:38,861 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-01-31 17:45:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 17:45:38,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:38,861 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:38,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:45:38,862 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:38,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:38,862 INFO L85 PathProgramCache]: Analyzing trace with hash 623258814, now seen corresponding path program 30 times [2022-01-31 17:45:38,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:38,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478687173] [2022-01-31 17:45:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:38,864 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:38,864 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:38,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:38,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:39,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:39,268 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 17:45:39,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478687173] [2022-01-31 17:45:39,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [478687173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:39,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:39,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:45:39,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029632509] [2022-01-31 17:45:39,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:39,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:45:39,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:39,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:45:39,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:45:39,270 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 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 17:45:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:39,793 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2022-01-31 17:45:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:45:39,793 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 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 81 [2022-01-31 17:45:39,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:39,794 INFO L225 Difference]: With dead ends: 108 [2022-01-31 17:45:39,794 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 17:45:39,795 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 17:45:39,795 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:39,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 35 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 17:45:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-01-31 17:45:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 82 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-01-31 17:45:39,805 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 81 [2022-01-31 17:45:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:39,805 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-01-31 17:45:39,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 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 17:45:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-01-31 17:45:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:45:39,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:39,806 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:39,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:45:39,806 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:39,806 INFO L85 PathProgramCache]: Analyzing trace with hash -326288420, now seen corresponding path program 31 times [2022-01-31 17:45:39,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:39,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511934940] [2022-01-31 17:45:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:39,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:39,808 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:39,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:39,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:40,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:40,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:40,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511934940] [2022-01-31 17:45:40,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511934940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:40,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:40,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:45:40,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500654433] [2022-01-31 17:45:40,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:40,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:45:40,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:45:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:45:40,291 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 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 17:45:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:40,906 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2022-01-31 17:45:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:45:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 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 83 [2022-01-31 17:45:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:40,907 INFO L225 Difference]: With dead ends: 110 [2022-01-31 17:45:40,907 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 17:45:40,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:45:40,909 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:40,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 45 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:40,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 17:45:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-01-31 17:45:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-01-31 17:45:40,922 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 83 [2022-01-31 17:45:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:40,922 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-01-31 17:45:40,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 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 17:45:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-01-31 17:45:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 17:45:40,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:40,923 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:40,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:45:40,923 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:40,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:40,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1986853754, now seen corresponding path program 32 times [2022-01-31 17:45:40,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:40,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86001235] [2022-01-31 17:45:40,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:40,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:40,926 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:40,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:40,927 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:41,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:41,423 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:41,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86001235] [2022-01-31 17:45:41,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [86001235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:41,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:41,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:45:41,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685349025] [2022-01-31 17:45:41,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:41,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:45:41,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:41,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:45:41,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:45:41,425 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 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 17:45:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:42,122 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2022-01-31 17:45:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:45:42,123 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 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 85 [2022-01-31 17:45:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:42,123 INFO L225 Difference]: With dead ends: 112 [2022-01-31 17:45:42,123 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 17:45:42,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:45:42,124 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:42,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 40 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:42,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 17:45:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-01-31 17:45:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 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 17:45:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-01-31 17:45:42,140 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 85 [2022-01-31 17:45:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:42,140 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-01-31 17:45:42,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 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 17:45:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-01-31 17:45:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:45:42,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:42,141 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:42,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:45:42,141 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:42,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:42,142 INFO L85 PathProgramCache]: Analyzing trace with hash 123423640, now seen corresponding path program 33 times [2022-01-31 17:45:42,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:42,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894675694] [2022-01-31 17:45:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:42,144 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:42,144 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:42,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:42,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:42,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:42,756 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 17:45:42,756 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:42,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894675694] [2022-01-31 17:45:42,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [894675694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:42,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:42,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:45:42,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077980724] [2022-01-31 17:45:42,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:42,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:45:42,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:45:42,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:45:42,758 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 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 17:45:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:43,450 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2022-01-31 17:45:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:45:43,451 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 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 87 [2022-01-31 17:45:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:43,452 INFO L225 Difference]: With dead ends: 114 [2022-01-31 17:45:43,452 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 17:45:43,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:45:43,453 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:43,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 45 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 17:45:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-01-31 17:45:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 88 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-01-31 17:45:43,468 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 87 [2022-01-31 17:45:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:43,468 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-01-31 17:45:43,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 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 17:45:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-01-31 17:45:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 17:45:43,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:43,469 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:43,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:45:43,470 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:43,470 INFO L85 PathProgramCache]: Analyzing trace with hash 368446518, now seen corresponding path program 34 times [2022-01-31 17:45:43,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:43,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566498738] [2022-01-31 17:45:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:43,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:43,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:43,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:43,475 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:44,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:44,157 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 17:45:44,157 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:44,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566498738] [2022-01-31 17:45:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [566498738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:44,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:44,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:45:44,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326493323] [2022-01-31 17:45:44,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:44,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:45:44,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:45:44,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:45:44,159 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 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 17:45:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:44,882 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2022-01-31 17:45:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:45:44,882 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 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 89 [2022-01-31 17:45:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:44,883 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:45:44,883 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 17:45:44,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:45:44,884 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 89 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:44,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 50 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:44,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 17:45:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-01-31 17:45:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-01-31 17:45:44,901 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2022-01-31 17:45:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:44,901 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-01-31 17:45:44,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 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 17:45:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-01-31 17:45:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:45:44,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:44,905 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:44,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:45:44,905 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash -387769004, now seen corresponding path program 35 times [2022-01-31 17:45:44,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:44,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371211288] [2022-01-31 17:45:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:44,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:44,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:44,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:44,911 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:45,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:45,766 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:45,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371211288] [2022-01-31 17:45:45,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [371211288] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:45,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:45,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:45:45,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902196674] [2022-01-31 17:45:45,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:45,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:45:45,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:45,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:45:45,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:45:45,768 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 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 17:45:46,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:46,601 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2022-01-31 17:45:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:45:46,601 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 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 91 [2022-01-31 17:45:46,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:46,602 INFO L225 Difference]: With dead ends: 118 [2022-01-31 17:45:46,602 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 17:45:46,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:45:46,604 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:46,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 40 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:46,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 17:45:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-01-31 17:45:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 92 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-01-31 17:45:46,620 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 91 [2022-01-31 17:45:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:46,621 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-01-31 17:45:46,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 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 17:45:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-01-31 17:45:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 17:45:46,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:46,621 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:46,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:45:46,622 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:46,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:46,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1261412622, now seen corresponding path program 36 times [2022-01-31 17:45:46,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:46,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478186608] [2022-01-31 17:45:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:46,624 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:46,624 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:46,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:46,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:47,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:47,204 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 17:45:47,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:47,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478186608] [2022-01-31 17:45:47,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [478186608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:47,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:47,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:45:47,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612533511] [2022-01-31 17:45:47,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:47,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:45:47,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:47,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:45:47,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:45:47,206 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 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 17:45:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:47,901 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2022-01-31 17:45:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:45:47,902 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 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 93 [2022-01-31 17:45:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:47,902 INFO L225 Difference]: With dead ends: 120 [2022-01-31 17:45:47,902 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 17:45:47,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:45:47,904 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 93 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:47,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 50 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 17:45:47,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-01-31 17:45:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 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 17:45:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2022-01-31 17:45:47,915 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 93 [2022-01-31 17:45:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:47,915 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2022-01-31 17:45:47,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 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 17:45:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2022-01-31 17:45:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:45:47,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:47,916 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:47,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:45:47,916 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash 980660496, now seen corresponding path program 37 times [2022-01-31 17:45:47,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:47,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679026029] [2022-01-31 17:45:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:47,918 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:47,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:47,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:47,920 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:48,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:48,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:48,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679026029] [2022-01-31 17:45:48,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1679026029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:48,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:48,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:45:48,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999819253] [2022-01-31 17:45:48,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:48,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:45:48,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:48,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:45:48,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:45:48,570 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 17:45:49,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:49,300 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2022-01-31 17:45:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:45:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 95 [2022-01-31 17:45:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:49,301 INFO L225 Difference]: With dead ends: 122 [2022-01-31 17:45:49,301 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 17:45:49,302 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 17:45:49,302 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:49,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 45 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:49,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 17:45:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-01-31 17:45:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 96 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-01-31 17:45:49,315 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 95 [2022-01-31 17:45:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:49,315 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-01-31 17:45:49,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 17:45:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-01-31 17:45:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 17:45:49,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:49,316 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:49,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:45:49,316 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:49,316 INFO L85 PathProgramCache]: Analyzing trace with hash -460655698, now seen corresponding path program 38 times [2022-01-31 17:45:49,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:49,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275924936] [2022-01-31 17:45:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:49,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:49,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:49,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:49,321 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:49,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:49,913 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 17:45:49,913 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275924936] [2022-01-31 17:45:49,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [275924936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:49,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:49,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:45:49,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558859434] [2022-01-31 17:45:49,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:49,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:45:49,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:49,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:45:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:45:49,915 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 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 17:45:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:50,748 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2022-01-31 17:45:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:45:50,748 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 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 97 [2022-01-31 17:45:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:50,749 INFO L225 Difference]: With dead ends: 124 [2022-01-31 17:45:50,749 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 17:45:50,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:45:50,750 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:50,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 55 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 17:45:50,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-01-31 17:45:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 98 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-01-31 17:45:50,769 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 97 [2022-01-31 17:45:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:50,769 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-01-31 17:45:50,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 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 17:45:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-01-31 17:45:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:45:50,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:50,770 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:50,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:45:50,770 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:50,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:50,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1708918476, now seen corresponding path program 39 times [2022-01-31 17:45:50,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:50,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857829877] [2022-01-31 17:45:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:50,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:50,773 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:50,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:50,775 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:51,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:51,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:51,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857829877] [2022-01-31 17:45:51,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [857829877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:51,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:51,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:45:51,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725591411] [2022-01-31 17:45:51,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:51,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:45:51,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:45:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:45:51,462 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 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 17:45:52,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:52,252 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2022-01-31 17:45:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:45:52,252 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 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 99 [2022-01-31 17:45:52,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:52,253 INFO L225 Difference]: With dead ends: 126 [2022-01-31 17:45:52,253 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 17:45:52,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:45:52,263 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:52,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 40 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 17:45:52,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-01-31 17:45:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.05) internal successors, (105), 100 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-01-31 17:45:52,285 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 99 [2022-01-31 17:45:52,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:52,286 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-01-31 17:45:52,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 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 17:45:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-01-31 17:45:52,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 17:45:52,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:52,287 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:52,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:45:52,288 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash -684406166, now seen corresponding path program 40 times [2022-01-31 17:45:52,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:52,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615802978] [2022-01-31 17:45:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:52,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:52,290 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:52,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:52,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:52,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:52,993 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:52,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615802978] [2022-01-31 17:45:52,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615802978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:52,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:52,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:45:52,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329853530] [2022-01-31 17:45:52,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:52,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:45:52,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:52,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:45:52,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:45:52,995 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 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 17:45:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:53,828 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2022-01-31 17:45:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:45:53,828 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 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 101 [2022-01-31 17:45:53,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:53,829 INFO L225 Difference]: With dead ends: 128 [2022-01-31 17:45:53,829 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 17:45:53,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:45:53,830 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 101 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:53,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 50 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 17:45:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-01-31 17:45:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 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 17:45:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-01-31 17:45:53,847 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 101 [2022-01-31 17:45:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:53,847 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-01-31 17:45:53,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 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 17:45:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-01-31 17:45:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 17:45:53,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:53,848 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:53,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:45:53,848 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1433083528, now seen corresponding path program 41 times [2022-01-31 17:45:53,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:53,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053533695] [2022-01-31 17:45:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:53,851 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:53,851 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:53,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:53,853 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:54,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:54,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:54,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053533695] [2022-01-31 17:45:54,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1053533695] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:54,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:54,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:45:54,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564047333] [2022-01-31 17:45:54,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:54,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:45:54,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:45:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:45:54,554 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 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 17:45:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:55,413 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2022-01-31 17:45:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:45:55,413 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 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 103 [2022-01-31 17:45:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:55,414 INFO L225 Difference]: With dead ends: 130 [2022-01-31 17:45:55,414 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 17:45:55,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:45:55,415 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:55,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 60 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:55,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 17:45:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-01-31 17:45:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-01-31 17:45:55,430 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 103 [2022-01-31 17:45:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:55,430 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-01-31 17:45:55,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 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 17:45:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-01-31 17:45:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 17:45:55,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:55,431 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:55,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:45:55,432 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash 526181158, now seen corresponding path program 42 times [2022-01-31 17:45:55,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:55,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980961998] [2022-01-31 17:45:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:55,434 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:55,434 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:55,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:55,437 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:56,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:56,154 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 17:45:56,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:56,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980961998] [2022-01-31 17:45:56,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [980961998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:56,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:56,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:45:56,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094483440] [2022-01-31 17:45:56,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:56,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:45:56,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:56,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:45:56,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:45:56,156 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 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 17:45:57,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:57,096 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2022-01-31 17:45:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:45:57,097 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 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 105 [2022-01-31 17:45:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:57,097 INFO L225 Difference]: With dead ends: 132 [2022-01-31 17:45:57,097 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 17:45:57,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:45:57,098 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:57,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 55 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 17:45:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-01-31 17:45:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-01-31 17:45:57,119 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 105 [2022-01-31 17:45:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:57,119 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-01-31 17:45:57,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 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 17:45:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-01-31 17:45:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:45:57,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:57,120 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:57,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:45:57,120 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash 871364676, now seen corresponding path program 43 times [2022-01-31 17:45:57,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:57,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140327249] [2022-01-31 17:45:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:57,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:57,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:57,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:57,124 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:57,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:57,864 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:57,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140327249] [2022-01-31 17:45:57,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140327249] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:57,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:57,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:45:57,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120495445] [2022-01-31 17:45:57,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:57,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:45:57,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:45:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:45:57,866 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 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 17:45:58,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:58,805 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2022-01-31 17:45:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:45:58,805 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 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 107 [2022-01-31 17:45:58,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:58,806 INFO L225 Difference]: With dead ends: 134 [2022-01-31 17:45:58,806 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 17:45:58,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:45:58,808 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 107 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:58,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 35 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:45:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 17:45:58,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-01-31 17:45:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 108 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2022-01-31 17:45:58,831 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 107 [2022-01-31 17:45:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:58,831 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2022-01-31 17:45:58,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 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 17:45:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2022-01-31 17:45:58,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 17:45:58,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:58,832 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:58,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:45:58,832 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1880243682, now seen corresponding path program 44 times [2022-01-31 17:45:58,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:58,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855355121] [2022-01-31 17:45:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:58,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:58,840 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:58,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:58,842 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:59,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:59,654 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:59,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855355121] [2022-01-31 17:45:59,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [855355121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:59,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:59,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:45:59,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600951002] [2022-01-31 17:45:59,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:59,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:45:59,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:59,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:45:59,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:45:59,656 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 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 17:46:00,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:00,713 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2022-01-31 17:46:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:46:00,714 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 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 109 [2022-01-31 17:46:00,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:00,714 INFO L225 Difference]: With dead ends: 136 [2022-01-31 17:46:00,714 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 17:46:00,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:46:00,715 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 109 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:00,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 50 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 17:46:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-01-31 17:46:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 110 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 17:46:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-01-31 17:46:00,731 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2022-01-31 17:46:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:00,731 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-01-31 17:46:00,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 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 17:46:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-01-31 17:46:00,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:46:00,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:00,732 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:00,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:46:00,732 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:00,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:00,732 INFO L85 PathProgramCache]: Analyzing trace with hash 750359552, now seen corresponding path program 45 times [2022-01-31 17:46:00,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:00,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80967494] [2022-01-31 17:46:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:00,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:00,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:00,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:00,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:01,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:01,528 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:01,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80967494] [2022-01-31 17:46:01,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [80967494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:01,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:01,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:46:01,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490592616] [2022-01-31 17:46:01,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:01,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:46:01,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:46:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:46:01,530 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 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 17:46:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:02,520 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2022-01-31 17:46:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:46:02,521 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 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 111 [2022-01-31 17:46:02,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:02,521 INFO L225 Difference]: With dead ends: 138 [2022-01-31 17:46:02,521 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 17:46:02,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:46:02,522 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:02,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 35 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 17:46:02,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-01-31 17:46:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.0446428571428572) internal successors, (117), 112 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2022-01-31 17:46:02,546 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 111 [2022-01-31 17:46:02,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:02,546 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2022-01-31 17:46:02,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 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 17:46:02,547 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2022-01-31 17:46:02,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 17:46:02,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:02,547 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:02,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:46:02,547 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1558436510, now seen corresponding path program 46 times [2022-01-31 17:46:02,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:02,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259230267] [2022-01-31 17:46:02,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:02,550 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:02,550 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:02,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:02,552 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:03,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:03,440 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:03,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259230267] [2022-01-31 17:46:03,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259230267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:03,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:03,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:46:03,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153531922] [2022-01-31 17:46:03,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:03,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:46:03,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:03,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:46:03,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:46:03,442 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 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 17:46:04,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:04,458 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2022-01-31 17:46:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:46:04,459 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 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 113 [2022-01-31 17:46:04,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:04,459 INFO L225 Difference]: With dead ends: 140 [2022-01-31 17:46:04,460 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 17:46:04,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:46:04,461 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 113 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:04,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 40 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 17:46:04,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-01-31 17:46:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.043859649122807) internal successors, (119), 114 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-01-31 17:46:04,478 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 113 [2022-01-31 17:46:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:04,478 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-01-31 17:46:04,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 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 17:46:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-01-31 17:46:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:46:04,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:04,479 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:04,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:46:04,479 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash 731312572, now seen corresponding path program 47 times [2022-01-31 17:46:04,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:04,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273158383] [2022-01-31 17:46:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:04,482 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:04,482 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:04,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:04,486 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:05,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:05,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:05,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273158383] [2022-01-31 17:46:05,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [273158383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:05,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:05,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:46:05,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286537833] [2022-01-31 17:46:05,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:05,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:46:05,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:05,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:46:05,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:46:05,383 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 50 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 17:46:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:06,552 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2022-01-31 17:46:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:46:06,552 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 50 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 115 [2022-01-31 17:46:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:06,553 INFO L225 Difference]: With dead ends: 142 [2022-01-31 17:46:06,553 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 17:46:06,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:46:06,554 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 115 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:06,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 45 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:46:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 17:46:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-01-31 17:46:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-01-31 17:46:06,579 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 115 [2022-01-31 17:46:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:06,579 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-01-31 17:46:06,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 50 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 17:46:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-01-31 17:46:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 17:46:06,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:06,580 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:06,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:46:06,580 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash 434157914, now seen corresponding path program 48 times [2022-01-31 17:46:06,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:06,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307443998] [2022-01-31 17:46:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:06,582 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:06,582 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:06,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:06,584 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:07,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:07,489 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:07,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307443998] [2022-01-31 17:46:07,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [307443998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:07,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:07,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:46:07,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849542404] [2022-01-31 17:46:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:07,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:46:07,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:07,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:46:07,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:46:07,490 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 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 17:46:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:08,610 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2022-01-31 17:46:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:46:08,611 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 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 117 [2022-01-31 17:46:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:08,613 INFO L225 Difference]: With dead ends: 144 [2022-01-31 17:46:08,613 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 17:46:08,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:46:08,615 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:08,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 55 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 17:46:08,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-01-31 17:46:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 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 17:46:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2022-01-31 17:46:08,636 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 117 [2022-01-31 17:46:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:08,636 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2022-01-31 17:46:08,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 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 17:46:08,637 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2022-01-31 17:46:08,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 17:46:08,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:08,637 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:08,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:46:08,637 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:08,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:08,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1663626888, now seen corresponding path program 49 times [2022-01-31 17:46:08,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:08,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264359868] [2022-01-31 17:46:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:08,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:08,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:08,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:08,642 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:09,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:09,672 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:09,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264359868] [2022-01-31 17:46:09,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264359868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:09,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:09,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:46:09,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889936648] [2022-01-31 17:46:09,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:09,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:46:09,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:09,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:46:09,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:46:09,673 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 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 17:46:10,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:10,835 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2022-01-31 17:46:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:46:10,836 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 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 119 [2022-01-31 17:46:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:10,836 INFO L225 Difference]: With dead ends: 146 [2022-01-31 17:46:10,837 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 17:46:10,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:46:10,838 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:10,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 65 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 17:46:10,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-01-31 17:46:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.0416666666666667) internal successors, (125), 120 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-01-31 17:46:10,857 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 119 [2022-01-31 17:46:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:10,857 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-01-31 17:46:10,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 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 17:46:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-01-31 17:46:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 17:46:10,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:10,858 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:10,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:46:10,859 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash 999807510, now seen corresponding path program 50 times [2022-01-31 17:46:10,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:10,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133109704] [2022-01-31 17:46:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:10,861 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:10,861 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:10,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:10,863 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:11,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:11,905 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 17:46:11,905 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133109704] [2022-01-31 17:46:11,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [133109704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:11,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:11,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:46:11,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169504110] [2022-01-31 17:46:11,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:11,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:46:11,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:46:11,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:46:11,907 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 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 17:46:13,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:13,080 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2022-01-31 17:46:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:46:13,081 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 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 121 [2022-01-31 17:46:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:13,081 INFO L225 Difference]: With dead ends: 148 [2022-01-31 17:46:13,081 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 17:46:13,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:46:13,083 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 121 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:13,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 40 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 17:46:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-01-31 17:46:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.040983606557377) internal successors, (127), 122 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2022-01-31 17:46:13,104 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 121 [2022-01-31 17:46:13,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:13,105 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2022-01-31 17:46:13,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 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 17:46:13,105 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2022-01-31 17:46:13,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:46:13,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:13,105 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:13,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:46:13,105 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:13,106 INFO L85 PathProgramCache]: Analyzing trace with hash 759755572, now seen corresponding path program 51 times [2022-01-31 17:46:13,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:13,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128904464] [2022-01-31 17:46:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:13,107 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:13,107 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:13,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:13,110 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:14,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:14,118 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:14,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128904464] [2022-01-31 17:46:14,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2128904464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:14,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:14,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:46:14,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71574345] [2022-01-31 17:46:14,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:14,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:46:14,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:14,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:46:14,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:46:14,120 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 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 17:46:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:15,327 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2022-01-31 17:46:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:46:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 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 123 [2022-01-31 17:46:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:15,328 INFO L225 Difference]: With dead ends: 150 [2022-01-31 17:46:15,328 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 17:46:15,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:46:15,330 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:15,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 55 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 17:46:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-01-31 17:46:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.0403225806451613) internal successors, (129), 124 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:15,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-01-31 17:46:15,355 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 123 [2022-01-31 17:46:15,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:15,355 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-01-31 17:46:15,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 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 17:46:15,355 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-01-31 17:46:15,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 17:46:15,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:15,356 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:15,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:46:15,356 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:15,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1998077138, now seen corresponding path program 52 times [2022-01-31 17:46:15,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:15,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263512042] [2022-01-31 17:46:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:15,358 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:15,358 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:15,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:15,361 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:16,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:16,449 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:16,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263512042] [2022-01-31 17:46:16,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263512042] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:16,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:16,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:46:16,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989228426] [2022-01-31 17:46:16,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:16,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:46:16,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:46:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:46:16,457 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 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 17:46:17,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:17,707 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2022-01-31 17:46:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:46:17,707 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 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 125 [2022-01-31 17:46:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:17,708 INFO L225 Difference]: With dead ends: 152 [2022-01-31 17:46:17,708 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 17:46:17,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:46:17,710 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:17,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 45 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 17:46:17,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-01-31 17:46:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 126 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 17:46:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-01-31 17:46:17,735 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 125 [2022-01-31 17:46:17,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:17,736 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-01-31 17:46:17,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 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 17:46:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-01-31 17:46:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 17:46:17,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:17,736 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:17,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:46:17,737 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:17,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:17,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1975806224, now seen corresponding path program 53 times [2022-01-31 17:46:17,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:17,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104712004] [2022-01-31 17:46:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:17,739 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:17,739 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:17,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:17,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:18,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:18,795 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:18,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104712004] [2022-01-31 17:46:18,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [104712004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:18,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:18,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:46:18,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065608925] [2022-01-31 17:46:18,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:18,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:46:18,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:46:18,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:46:18,797 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 56 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 17:46:20,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:20,242 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2022-01-31 17:46:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:46:20,242 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 56 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 127 [2022-01-31 17:46:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:20,243 INFO L225 Difference]: With dead ends: 154 [2022-01-31 17:46:20,243 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 17:46:20,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:46:20,244 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 127 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:20,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 40 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 17:46:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-01-31 17:46:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 128 states have (on average 1.0390625) internal successors, (133), 128 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2022-01-31 17:46:20,298 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 127 [2022-01-31 17:46:20,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:20,298 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2022-01-31 17:46:20,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 56 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 17:46:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2022-01-31 17:46:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 17:46:20,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:20,299 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:20,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:46:20,300 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1643176334, now seen corresponding path program 54 times [2022-01-31 17:46:20,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:20,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269705224] [2022-01-31 17:46:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:20,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:20,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:20,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:20,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:21,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:21,681 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:21,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269705224] [2022-01-31 17:46:21,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1269705224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:21,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:21,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:46:21,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613913438] [2022-01-31 17:46:21,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:21,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:46:21,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:21,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:46:21,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:46:21,683 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 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 17:46:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:23,001 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2022-01-31 17:46:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:46:23,002 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 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 129 [2022-01-31 17:46:23,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:23,002 INFO L225 Difference]: With dead ends: 156 [2022-01-31 17:46:23,003 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 17:46:23,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:46:23,004 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 129 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:23,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 40 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:23,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 17:46:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-01-31 17:46:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0384615384615385) internal successors, (135), 130 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2022-01-31 17:46:23,037 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 129 [2022-01-31 17:46:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:23,037 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2022-01-31 17:46:23,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 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 17:46:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2022-01-31 17:46:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:46:23,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:23,038 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:23,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:46:23,038 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:23,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:23,038 INFO L85 PathProgramCache]: Analyzing trace with hash 561904812, now seen corresponding path program 55 times [2022-01-31 17:46:23,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:23,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76026146] [2022-01-31 17:46:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:23,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:23,040 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:23,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:23,043 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:24,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:24,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:24,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76026146] [2022-01-31 17:46:24,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [76026146] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:24,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:24,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:46:24,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592585987] [2022-01-31 17:46:24,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:24,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:46:24,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:46:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:46:24,181 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 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 17:46:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:25,535 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2022-01-31 17:46:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:46:25,536 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 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 131 [2022-01-31 17:46:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:25,536 INFO L225 Difference]: With dead ends: 158 [2022-01-31 17:46:25,536 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 17:46:25,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:46:25,538 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 131 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:25,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 45 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 17:46:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-01-31 17:46:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-01-31 17:46:25,571 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 131 [2022-01-31 17:46:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:25,571 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-01-31 17:46:25,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 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 17:46:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-01-31 17:46:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 17:46:25,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:25,572 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:25,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:46:25,572 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash 842057802, now seen corresponding path program 56 times [2022-01-31 17:46:25,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:25,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501560372] [2022-01-31 17:46:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:25,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:25,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:25,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:25,577 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:26,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:26,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:26,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501560372] [2022-01-31 17:46:26,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [501560372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:26,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:26,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:46:26,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983983587] [2022-01-31 17:46:26,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:26,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:46:26,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:26,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:46:26,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:46:26,750 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 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 17:46:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:28,193 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2022-01-31 17:46:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:46:28,193 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 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 133 [2022-01-31 17:46:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:28,194 INFO L225 Difference]: With dead ends: 160 [2022-01-31 17:46:28,194 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 17:46:28,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:46:28,196 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:28,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 50 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 17:46:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-01-31 17:46:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.037313432835821) internal successors, (139), 134 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 17:46:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-01-31 17:46:28,222 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 133 [2022-01-31 17:46:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:28,222 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-01-31 17:46:28,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 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 17:46:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-01-31 17:46:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:46:28,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:28,223 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:28,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:46:28,223 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash -513858456, now seen corresponding path program 57 times [2022-01-31 17:46:28,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:28,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709365956] [2022-01-31 17:46:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:28,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:28,225 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:28,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:28,227 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:29,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:29,439 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709365956] [2022-01-31 17:46:29,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [709365956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:29,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:29,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:46:29,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299169145] [2022-01-31 17:46:29,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:29,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:46:29,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:29,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:46:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:46:29,441 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 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 17:46:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:31,000 INFO L93 Difference]: Finished difference Result 162 states and 170 transitions. [2022-01-31 17:46:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:46:31,000 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 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 135 [2022-01-31 17:46:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:31,001 INFO L225 Difference]: With dead ends: 162 [2022-01-31 17:46:31,001 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 17:46:31,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:46:31,002 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 135 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:31,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 55 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:46:31,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 17:46:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-01-31 17:46:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.036764705882353) internal successors, (141), 136 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2022-01-31 17:46:31,025 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 135 [2022-01-31 17:46:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:31,026 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2022-01-31 17:46:31,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 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 17:46:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2022-01-31 17:46:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 17:46:31,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:31,027 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:31,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:46:31,027 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:31,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2120675590, now seen corresponding path program 58 times [2022-01-31 17:46:31,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:31,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700331167] [2022-01-31 17:46:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:31,029 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:31,029 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:31,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:31,032 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:32,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:32,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:32,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700331167] [2022-01-31 17:46:32,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700331167] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:32,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:32,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:46:32,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113747956] [2022-01-31 17:46:32,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:32,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:46:32,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:32,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:46:32,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:46:32,291 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 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 17:46:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:33,830 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2022-01-31 17:46:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:46:33,831 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 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 137 [2022-01-31 17:46:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:33,832 INFO L225 Difference]: With dead ends: 164 [2022-01-31 17:46:33,832 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 17:46:33,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:46:33,834 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 137 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:33,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 65 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:46:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 17:46:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-01-31 17:46:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.036231884057971) internal successors, (143), 138 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2022-01-31 17:46:33,876 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 137 [2022-01-31 17:46:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:33,876 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2022-01-31 17:46:33,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 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 17:46:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2022-01-31 17:46:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:46:33,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:33,877 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:33,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:46:33,877 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:33,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:33,878 INFO L85 PathProgramCache]: Analyzing trace with hash -122810844, now seen corresponding path program 59 times [2022-01-31 17:46:33,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:33,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471214880] [2022-01-31 17:46:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:33,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:33,879 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:33,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:33,882 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:35,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:35,268 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 17:46:35,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:35,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471214880] [2022-01-31 17:46:35,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471214880] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:35,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:35,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:46:35,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111808084] [2022-01-31 17:46:35,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:35,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:46:35,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:35,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:46:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:46:35,271 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 63 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 62 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 17:46:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:36,867 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2022-01-31 17:46:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:46:36,868 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 62 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 139 [2022-01-31 17:46:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:36,868 INFO L225 Difference]: With dead ends: 166 [2022-01-31 17:46:36,868 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 17:46:36,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:46:36,870 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:36,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 55 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:46:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 17:46:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-01-31 17:46:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.0357142857142858) internal successors, (145), 140 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2022-01-31 17:46:36,894 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 139 [2022-01-31 17:46:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:36,894 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2022-01-31 17:46:36,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 62 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 17:46:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2022-01-31 17:46:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 17:46:36,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:36,895 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:36,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:46:36,895 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:36,895 INFO L85 PathProgramCache]: Analyzing trace with hash -39691326, now seen corresponding path program 60 times [2022-01-31 17:46:36,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:36,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930375163] [2022-01-31 17:46:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:36,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:36,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:36,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:36,900 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:38,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:38,392 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 17:46:38,392 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930375163] [2022-01-31 17:46:38,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1930375163] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:38,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:38,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:46:38,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49169814] [2022-01-31 17:46:38,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:38,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:46:38,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:46:38,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:46:38,394 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 64 states, 64 states have (on average 2.09375) internal successors, (134), 63 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 17:46:40,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:40,024 INFO L93 Difference]: Finished difference Result 168 states and 176 transitions. [2022-01-31 17:46:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:46:40,024 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.09375) internal successors, (134), 63 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 141 [2022-01-31 17:46:40,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:40,025 INFO L225 Difference]: With dead ends: 168 [2022-01-31 17:46:40,025 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 17:46:40,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:46:40,026 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 141 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:40,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 45 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 17:46:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-01-31 17:46:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.0352112676056338) internal successors, (147), 142 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 17:46:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2022-01-31 17:46:40,056 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 141 [2022-01-31 17:46:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:40,057 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2022-01-31 17:46:40,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.09375) internal successors, (134), 63 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 17:46:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2022-01-31 17:46:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 17:46:40,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:40,058 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:40,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:46:40,058 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:40,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:40,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1766213152, now seen corresponding path program 61 times [2022-01-31 17:46:40,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:40,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930949394] [2022-01-31 17:46:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:40,060 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:40,060 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:40,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:40,063 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:41,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:41,581 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:41,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930949394] [2022-01-31 17:46:41,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1930949394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:41,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:41,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:46:41,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516516020] [2022-01-31 17:46:41,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:41,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:46:41,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:41,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:46:41,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:46:41,582 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 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 17:46:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:43,324 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2022-01-31 17:46:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:46:43,324 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 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 143 [2022-01-31 17:46:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:43,325 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:46:43,325 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 17:46:43,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:46:43,327 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 143 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:43,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 40 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:46:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 17:46:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-01-31 17:46:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 144 states have (on average 1.0347222222222223) internal successors, (149), 144 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2022-01-31 17:46:43,394 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 143 [2022-01-31 17:46:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:43,409 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2022-01-31 17:46:43,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 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 17:46:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2022-01-31 17:46:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 17:46:43,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:43,410 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:43,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:46:43,410 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:43,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1198655614, now seen corresponding path program 62 times [2022-01-31 17:46:43,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:43,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499942653] [2022-01-31 17:46:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:43,427 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:43,427 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:43,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:43,430 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:45,115 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 17:46:45,116 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:45,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499942653] [2022-01-31 17:46:45,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1499942653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:45,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:45,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:46:45,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924475763] [2022-01-31 17:46:45,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:45,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:46:45,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:46:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:46:45,118 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 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 17:46:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:47,214 INFO L93 Difference]: Finished difference Result 172 states and 180 transitions. [2022-01-31 17:46:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:46:47,214 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 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 145 [2022-01-31 17:46:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:47,215 INFO L225 Difference]: With dead ends: 172 [2022-01-31 17:46:47,215 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 17:46:47,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:46:47,217 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 145 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:47,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 40 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:46:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 17:46:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-01-31 17:46:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0342465753424657) internal successors, (151), 146 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-01-31 17:46:47,290 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 145 [2022-01-31 17:46:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:47,291 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-01-31 17:46:47,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 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 17:46:47,291 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-01-31 17:46:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:46:47,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:47,292 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:47,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:46:47,292 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1420744804, now seen corresponding path program 63 times [2022-01-31 17:46:47,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:47,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532288286] [2022-01-31 17:46:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:47,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:47,308 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:47,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:47,312 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:48,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:48,904 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:48,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532288286] [2022-01-31 17:46:48,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [532288286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:48,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:48,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:46:48,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109026656] [2022-01-31 17:46:48,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:48,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:46:48,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:46:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:46:48,906 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 67 states, 67 states have (on average 2.08955223880597) internal successors, (140), 66 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 17:46:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:50,631 INFO L93 Difference]: Finished difference Result 174 states and 182 transitions. [2022-01-31 17:46:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:46:50,632 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.08955223880597) internal successors, (140), 66 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 147 [2022-01-31 17:46:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:50,632 INFO L225 Difference]: With dead ends: 174 [2022-01-31 17:46:50,632 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 17:46:50,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:46:50,634 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 147 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:50,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 40 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 17:46:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-01-31 17:46:50,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 148 states have (on average 1.0337837837837838) internal successors, (153), 148 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:50,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2022-01-31 17:46:50,663 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 147 [2022-01-31 17:46:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:50,663 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2022-01-31 17:46:50,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.08955223880597) internal successors, (140), 66 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 17:46:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2022-01-31 17:46:50,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 17:46:50,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:50,664 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:50,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:46:50,665 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:50,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1813711046, now seen corresponding path program 64 times [2022-01-31 17:46:50,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:50,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433885657] [2022-01-31 17:46:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:50,667 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:50,667 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:50,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:50,670 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:52,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:52,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433885657] [2022-01-31 17:46:52,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [433885657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:52,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:52,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:46:52,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278902934] [2022-01-31 17:46:52,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:52,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:46:52,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:46:52,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:46:52,385 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 68 states, 68 states have (on average 2.088235294117647) internal successors, (142), 67 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 17:46:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:54,238 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2022-01-31 17:46:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:46:54,238 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.088235294117647) internal successors, (142), 67 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 149 [2022-01-31 17:46:54,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:54,239 INFO L225 Difference]: With dead ends: 176 [2022-01-31 17:46:54,239 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 17:46:54,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:46:54,241 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 149 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:54,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 45 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 17:46:54,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-01-31 17:46:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.0333333333333334) internal successors, (155), 150 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 17:46:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-01-31 17:46:54,270 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 149 [2022-01-31 17:46:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:54,270 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-01-31 17:46:54,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.088235294117647) internal successors, (142), 67 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 17:46:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-01-31 17:46:54,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:46:54,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:54,271 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:54,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:46:54,271 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:54,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:54,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1497147560, now seen corresponding path program 65 times [2022-01-31 17:46:54,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:54,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661532588] [2022-01-31 17:46:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:54,273 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:54,273 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:54,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:54,276 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:55,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:55,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:55,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661532588] [2022-01-31 17:46:55,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [661532588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:55,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:55,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:46:55,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996898889] [2022-01-31 17:46:55,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:55,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:46:55,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:55,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:46:55,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:46:55,781 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 68 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 17:46:57,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:57,599 INFO L93 Difference]: Finished difference Result 178 states and 186 transitions. [2022-01-31 17:46:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:46:57,599 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 68 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 151 [2022-01-31 17:46:57,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:57,600 INFO L225 Difference]: With dead ends: 178 [2022-01-31 17:46:57,600 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 17:46:57,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:46:57,603 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:57,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 55 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:46:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 17:46:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-01-31 17:46:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 152 states have (on average 1.0328947368421053) internal successors, (157), 152 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2022-01-31 17:46:57,645 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 151 [2022-01-31 17:46:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:57,645 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2022-01-31 17:46:57,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 68 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 17:46:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2022-01-31 17:46:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 17:46:57,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:57,646 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:57,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:46:57,646 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:57,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:57,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2072651766, now seen corresponding path program 66 times [2022-01-31 17:46:57,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:57,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340346974] [2022-01-31 17:46:57,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:57,648 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:57,648 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:57,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:57,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:59,193 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:59,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340346974] [2022-01-31 17:46:59,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [340346974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:59,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:59,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:46:59,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909705172] [2022-01-31 17:46:59,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:59,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:46:59,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:46:59,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:46:59,195 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 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 17:47:01,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:01,056 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2022-01-31 17:47:01,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:47:01,056 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 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 153 [2022-01-31 17:47:01,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:01,057 INFO L225 Difference]: With dead ends: 180 [2022-01-31 17:47:01,057 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 17:47:01,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:47:01,058 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 153 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:01,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 40 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:01,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 17:47:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-01-31 17:47:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0324675324675325) internal successors, (159), 154 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2022-01-31 17:47:01,089 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 153 [2022-01-31 17:47:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:01,089 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2022-01-31 17:47:01,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 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 17:47:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2022-01-31 17:47:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:47:01,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:01,095 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:01,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:47:01,096 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash 970934548, now seen corresponding path program 67 times [2022-01-31 17:47:01,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:01,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140532759] [2022-01-31 17:47:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:01,097 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:01,098 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:01,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:01,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:02,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:02,727 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 17:47:02,727 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:02,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140532759] [2022-01-31 17:47:02,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [140532759] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:02,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:02,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:47:02,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471463546] [2022-01-31 17:47:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:02,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:47:02,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:47:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:47:02,733 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 70 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 17:47:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:04,713 INFO L93 Difference]: Finished difference Result 182 states and 190 transitions. [2022-01-31 17:47:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:47:04,713 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 70 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 155 [2022-01-31 17:47:04,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:04,714 INFO L225 Difference]: With dead ends: 182 [2022-01-31 17:47:04,714 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 17:47:04,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:47:04,715 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 155 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:04,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 50 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 17:47:04,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-01-31 17:47:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.0320512820512822) internal successors, (161), 156 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2022-01-31 17:47:04,752 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 155 [2022-01-31 17:47:04,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:04,752 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2022-01-31 17:47:04,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 70 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 17:47:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2022-01-31 17:47:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 17:47:04,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:04,753 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:04,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:47:04,753 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1217357134, now seen corresponding path program 68 times [2022-01-31 17:47:04,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:04,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928965143] [2022-01-31 17:47:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:04,755 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:04,755 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:04,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:04,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:06,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:06,394 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:06,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928965143] [2022-01-31 17:47:06,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928965143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:06,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:06,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:47:06,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569608155] [2022-01-31 17:47:06,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:06,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:47:06,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:06,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:47:06,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:47:06,395 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 72 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 71 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 17:47:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:08,402 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2022-01-31 17:47:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:47:08,403 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 71 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 157 [2022-01-31 17:47:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:08,403 INFO L225 Difference]: With dead ends: 184 [2022-01-31 17:47:08,403 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 17:47:08,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:47:08,405 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 157 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:08,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 45 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:08,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 17:47:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-01-31 17:47:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.0316455696202531) internal successors, (163), 158 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 17:47:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2022-01-31 17:47:08,441 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 157 [2022-01-31 17:47:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:08,441 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2022-01-31 17:47:08,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 71 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 17:47:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2022-01-31 17:47:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:47:08,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:08,442 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:08,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:47:08,442 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:08,442 INFO L85 PathProgramCache]: Analyzing trace with hash 368311504, now seen corresponding path program 69 times [2022-01-31 17:47:08,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:08,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724949787] [2022-01-31 17:47:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:08,444 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:08,444 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:08,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:08,447 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:10,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:10,123 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:10,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724949787] [2022-01-31 17:47:10,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1724949787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:10,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:10,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:47:10,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424654249] [2022-01-31 17:47:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:10,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:47:10,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:47:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:47:10,124 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 72 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 17:47:12,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:12,202 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2022-01-31 17:47:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:47:12,203 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 72 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 159 [2022-01-31 17:47:12,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:12,204 INFO L225 Difference]: With dead ends: 186 [2022-01-31 17:47:12,204 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 17:47:12,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:47:12,205 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 159 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:12,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 65 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 17:47:12,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-01-31 17:47:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.03125) internal successors, (165), 160 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2022-01-31 17:47:12,252 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 159 [2022-01-31 17:47:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:12,252 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2022-01-31 17:47:12,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 72 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 17:47:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2022-01-31 17:47:12,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 17:47:12,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:12,253 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:12,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:47:12,253 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:12,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:12,253 INFO L85 PathProgramCache]: Analyzing trace with hash -517517458, now seen corresponding path program 70 times [2022-01-31 17:47:12,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:12,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306004407] [2022-01-31 17:47:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:12,255 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:12,255 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:12,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:12,259 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:14,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:14,037 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:14,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306004407] [2022-01-31 17:47:14,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1306004407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:14,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:14,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:47:14,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319272847] [2022-01-31 17:47:14,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:14,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:47:14,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:14,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:47:14,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:47:14,040 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 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 17:47:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:16,491 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2022-01-31 17:47:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:47:16,491 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 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 161 [2022-01-31 17:47:16,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:16,492 INFO L225 Difference]: With dead ends: 188 [2022-01-31 17:47:16,492 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 17:47:16,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:47:16,494 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 161 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:16,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 45 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 17:47:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-01-31 17:47:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0308641975308641) internal successors, (167), 162 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2022-01-31 17:47:16,531 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 161 [2022-01-31 17:47:16,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:16,531 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2022-01-31 17:47:16,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 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 17:47:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2022-01-31 17:47:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:47:16,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:16,533 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:16,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:47:16,533 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:16,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:16,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1395625332, now seen corresponding path program 71 times [2022-01-31 17:47:16,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:16,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168879363] [2022-01-31 17:47:16,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:16,535 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:16,535 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:16,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:16,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:18,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:18,290 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168879363] [2022-01-31 17:47:18,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168879363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:18,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:18,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:47:18,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797652822] [2022-01-31 17:47:18,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:18,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:47:18,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:47:18,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:47:18,293 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 75 states, 75 states have (on average 2.08) internal successors, (156), 74 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 17:47:20,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:20,423 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2022-01-31 17:47:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:47:20,423 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.08) internal successors, (156), 74 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 163 [2022-01-31 17:47:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:20,424 INFO L225 Difference]: With dead ends: 190 [2022-01-31 17:47:20,424 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 17:47:20,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:47:20,426 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 163 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:20,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 55 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 17:47:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-01-31 17:47:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.0304878048780488) internal successors, (169), 164 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2022-01-31 17:47:20,484 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 163 [2022-01-31 17:47:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:20,484 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2022-01-31 17:47:20,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.08) internal successors, (156), 74 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 17:47:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2022-01-31 17:47:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 17:47:20,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:20,485 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:20,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:47:20,486 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash 851265066, now seen corresponding path program 72 times [2022-01-31 17:47:20,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:20,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388055852] [2022-01-31 17:47:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:20,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:20,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:20,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:20,492 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:22,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:22,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:22,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388055852] [2022-01-31 17:47:22,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [388055852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:22,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:22,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:47:22,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058324694] [2022-01-31 17:47:22,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:22,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:47:22,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:22,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:47:22,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:47:22,276 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 75 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 17:47:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:24,463 INFO L93 Difference]: Finished difference Result 192 states and 200 transitions. [2022-01-31 17:47:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:47:24,463 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 75 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 165 [2022-01-31 17:47:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:24,464 INFO L225 Difference]: With dead ends: 192 [2022-01-31 17:47:24,464 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 17:47:24,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:47:24,466 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:24,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 55 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:24,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 17:47:24,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-01-31 17:47:24,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0301204819277108) internal successors, (171), 166 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 17:47:24,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2022-01-31 17:47:24,518 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 165 [2022-01-31 17:47:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:24,518 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2022-01-31 17:47:24,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 75 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 17:47:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2022-01-31 17:47:24,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:47:24,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:24,519 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:24,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:47:24,519 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:24,520 INFO L85 PathProgramCache]: Analyzing trace with hash -255612344, now seen corresponding path program 73 times [2022-01-31 17:47:24,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:24,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91103751] [2022-01-31 17:47:24,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:24,522 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:24,522 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:24,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:24,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:26,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:26,401 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:26,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91103751] [2022-01-31 17:47:26,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [91103751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:26,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:26,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:47:26,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725628020] [2022-01-31 17:47:26,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:26,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:47:26,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:26,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:47:26,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:47:26,403 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand has 77 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 76 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 17:47:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:28,644 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2022-01-31 17:47:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:47:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 76 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 167 [2022-01-31 17:47:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:28,645 INFO L225 Difference]: With dead ends: 194 [2022-01-31 17:47:28,645 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 17:47:28,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:47:28,647 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 167 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:28,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 55 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:28,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 17:47:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-01-31 17:47:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 168 states have (on average 1.0297619047619047) internal successors, (173), 168 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2022-01-31 17:47:28,689 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 167 [2022-01-31 17:47:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:28,689 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2022-01-31 17:47:28,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 76 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 17:47:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2022-01-31 17:47:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 17:47:28,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:28,690 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:28,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:47:28,691 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1187086054, now seen corresponding path program 74 times [2022-01-31 17:47:28,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:28,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143525049] [2022-01-31 17:47:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:28,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:28,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:28,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:28,696 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:30,573 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:30,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143525049] [2022-01-31 17:47:30,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2143525049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:30,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:30,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:47:30,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491126713] [2022-01-31 17:47:30,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:30,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:47:30,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:30,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:47:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:47:30,575 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 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 17:47:32,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:32,882 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2022-01-31 17:47:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:47:32,882 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 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 169 [2022-01-31 17:47:32,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:32,883 INFO L225 Difference]: With dead ends: 196 [2022-01-31 17:47:32,883 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 17:47:32,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:47:32,884 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:32,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 50 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 17:47:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-01-31 17:47:32,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.0294117647058822) internal successors, (175), 170 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2022-01-31 17:47:32,920 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 169 [2022-01-31 17:47:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:32,920 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2022-01-31 17:47:32,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 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 17:47:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2022-01-31 17:47:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:47:32,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:32,921 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:32,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:47:32,921 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:32,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:32,922 INFO L85 PathProgramCache]: Analyzing trace with hash 345809924, now seen corresponding path program 75 times [2022-01-31 17:47:32,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:32,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939131304] [2022-01-31 17:47:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:32,923 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:32,924 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:32,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:32,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:34,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:34,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:34,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939131304] [2022-01-31 17:47:34,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [939131304] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:34,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:34,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:47:34,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223349657] [2022-01-31 17:47:34,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:34,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:47:34,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:34,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:47:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:47:34,851 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 78 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 17:47:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:37,351 INFO L93 Difference]: Finished difference Result 198 states and 206 transitions. [2022-01-31 17:47:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:47:37,351 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 78 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 171 [2022-01-31 17:47:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:37,352 INFO L225 Difference]: With dead ends: 198 [2022-01-31 17:47:37,352 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 17:47:37,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:47:37,353 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 171 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:37,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 40 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 17:47:37,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-01-31 17:47:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 172 states have (on average 1.0290697674418605) internal successors, (177), 172 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2022-01-31 17:47:37,389 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 171 [2022-01-31 17:47:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:37,389 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2022-01-31 17:47:37,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 78 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 17:47:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2022-01-31 17:47:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 17:47:37,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:37,390 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:37,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:47:37,390 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:37,391 INFO L85 PathProgramCache]: Analyzing trace with hash -666699358, now seen corresponding path program 76 times [2022-01-31 17:47:37,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:37,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775226347] [2022-01-31 17:47:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:37,392 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:37,392 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:37,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:37,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:39,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:39,350 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 17:47:39,350 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:39,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775226347] [2022-01-31 17:47:39,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [775226347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:39,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:39,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:47:39,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796821951] [2022-01-31 17:47:39,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:39,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:47:39,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:47:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:47:39,351 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 80 states, 80 states have (on average 2.075) internal successors, (166), 79 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 17:47:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:41,736 INFO L93 Difference]: Finished difference Result 200 states and 208 transitions. [2022-01-31 17:47:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:47:41,737 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 79 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 173 [2022-01-31 17:47:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:41,737 INFO L225 Difference]: With dead ends: 200 [2022-01-31 17:47:41,737 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 17:47:41,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:47:41,739 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 173 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:41,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 35 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:41,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 17:47:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-01-31 17:47:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 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 17:47:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2022-01-31 17:47:41,781 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 173 [2022-01-31 17:47:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:41,781 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2022-01-31 17:47:41,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 79 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 17:47:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2022-01-31 17:47:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 17:47:41,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:41,781 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:41,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:47:41,782 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:41,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:41,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1269456832, now seen corresponding path program 77 times [2022-01-31 17:47:41,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:41,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072562400] [2022-01-31 17:47:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:41,783 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:41,784 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:41,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:41,793 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:43,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:43,786 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:43,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072562400] [2022-01-31 17:47:43,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2072562400] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:43,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:43,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:47:43,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127362510] [2022-01-31 17:47:43,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:43,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:47:43,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:47:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:47:43,788 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 80 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 17:47:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:46,280 INFO L93 Difference]: Finished difference Result 202 states and 210 transitions. [2022-01-31 17:47:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:47:46,280 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 80 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 175 [2022-01-31 17:47:46,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:46,281 INFO L225 Difference]: With dead ends: 202 [2022-01-31 17:47:46,281 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 17:47:46,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:47:46,282 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 175 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:46,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 65 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 17:47:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-01-31 17:47:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 176 states have (on average 1.0284090909090908) internal successors, (181), 176 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2022-01-31 17:47:46,331 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 175 [2022-01-31 17:47:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:46,331 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2022-01-31 17:47:46,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 80 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 17:47:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2022-01-31 17:47:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 17:47:46,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:46,332 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:46,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:47:46,332 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:46,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:46,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2100251042, now seen corresponding path program 78 times [2022-01-31 17:47:46,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:46,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877814547] [2022-01-31 17:47:46,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:46,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:46,334 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:46,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:46,339 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:48,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:48,402 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877814547] [2022-01-31 17:47:48,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877814547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:48,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:48,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:47:48,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693335532] [2022-01-31 17:47:48,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:48,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:47:48,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:47:48,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:47:48,404 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:50,909 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2022-01-31 17:47:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:47:50,909 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 17:47:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:50,910 INFO L225 Difference]: With dead ends: 204 [2022-01-31 17:47:50,910 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 17:47:50,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:47:50,911 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 177 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:50,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 45 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 17:47:50,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-01-31 17:47:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0280898876404494) internal successors, (183), 178 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2022-01-31 17:47:50,951 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 177 [2022-01-31 17:47:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:50,952 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2022-01-31 17:47:50,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2022-01-31 17:47:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:47:50,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:50,953 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:50,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:47:50,953 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:50,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1984176772, now seen corresponding path program 79 times [2022-01-31 17:47:50,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:50,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033334156] [2022-01-31 17:47:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:50,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:50,955 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:50,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:50,960 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:53,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:53,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:53,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033334156] [2022-01-31 17:47:53,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2033334156] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:53,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:53,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:47:53,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341688977] [2022-01-31 17:47:53,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:53,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:47:53,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:53,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:47:53,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:47:53,090 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 82 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:55,674 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2022-01-31 17:47:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:47:55,675 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 82 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 17:47:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:55,675 INFO L225 Difference]: With dead ends: 206 [2022-01-31 17:47:55,675 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 17:47:55,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:47:55,676 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 179 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:55,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 60 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 17:47:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-01-31 17:47:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.0277777777777777) internal successors, (185), 180 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:55,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2022-01-31 17:47:55,716 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 179 [2022-01-31 17:47:55,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:55,717 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2022-01-31 17:47:55,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 82 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:55,717 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2022-01-31 17:47:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 17:47:55,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:55,718 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:55,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:47:55,718 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2105952998, now seen corresponding path program 80 times [2022-01-31 17:47:55,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:55,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465174659] [2022-01-31 17:47:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:55,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:55,720 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:55,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:55,725 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:57,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:57,885 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:57,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465174659] [2022-01-31 17:47:57,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [465174659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:57,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:57,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:47:57,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309588254] [2022-01-31 17:47:57,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:57,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:47:57,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:47:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:47:57,886 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 84 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 83 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:00,533 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2022-01-31 17:48:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:48:00,534 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 83 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-01-31 17:48:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:00,534 INFO L225 Difference]: With dead ends: 208 [2022-01-31 17:48:00,534 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 17:48:00,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:48:00,535 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 181 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:00,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 70 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 17:48:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-01-31 17:48:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.0274725274725274) internal successors, (187), 182 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 17:48:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2022-01-31 17:48:00,576 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 181 [2022-01-31 17:48:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:00,576 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2022-01-31 17:48:00,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 83 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:00,576 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2022-01-31 17:48:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:48:00,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:00,577 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:00,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:48:00,577 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:00,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:00,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1126178104, now seen corresponding path program 81 times [2022-01-31 17:48:00,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:00,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098902930] [2022-01-31 17:48:00,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:00,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:00,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:00,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:00,584 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:02,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:02,792 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:02,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098902930] [2022-01-31 17:48:02,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2098902930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:02,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:02,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:48:02,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146239437] [2022-01-31 17:48:02,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:02,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:48:02,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:48:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:48:02,794 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 85 states, 85 states have (on average 2.070588235294118) internal successors, (176), 84 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:05,485 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2022-01-31 17:48:05,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:48:05,486 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.070588235294118) internal successors, (176), 84 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 17:48:05,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:05,487 INFO L225 Difference]: With dead ends: 210 [2022-01-31 17:48:05,487 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 17:48:05,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:48:05,488 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 183 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:05,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 50 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:05,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 17:48:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-01-31 17:48:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.0271739130434783) internal successors, (189), 184 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2022-01-31 17:48:05,530 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 183 [2022-01-31 17:48:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:05,530 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2022-01-31 17:48:05,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.070588235294118) internal successors, (176), 84 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2022-01-31 17:48:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 17:48:05,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:05,531 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:05,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:48:05,531 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1942812118, now seen corresponding path program 82 times [2022-01-31 17:48:05,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:05,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905152449] [2022-01-31 17:48:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:05,533 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:05,533 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:05,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:05,538 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:07,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:07,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:07,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905152449] [2022-01-31 17:48:07,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1905152449] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:07,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:07,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:48:07,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651373735] [2022-01-31 17:48:07,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:07,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:48:07,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:07,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:48:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:48:07,825 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:10,711 INFO L93 Difference]: Finished difference Result 212 states and 220 transitions. [2022-01-31 17:48:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:48:10,712 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 17:48:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:10,712 INFO L225 Difference]: With dead ends: 212 [2022-01-31 17:48:10,712 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 17:48:10,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:48:10,714 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 185 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:10,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 60 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:10,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 17:48:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-01-31 17:48:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0268817204301075) internal successors, (191), 186 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-01-31 17:48:10,765 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 185 [2022-01-31 17:48:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:10,765 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-01-31 17:48:10,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-01-31 17:48:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:48:10,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:10,767 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:10,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:48:10,767 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash 749084404, now seen corresponding path program 83 times [2022-01-31 17:48:10,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:10,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505791127] [2022-01-31 17:48:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:10,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:10,769 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:10,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:10,774 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:13,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:13,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:13,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505791127] [2022-01-31 17:48:13,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1505791127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:13,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:13,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:48:13,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920564160] [2022-01-31 17:48:13,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:13,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:48:13,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:13,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:48:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:48:13,068 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 86 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:15,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:15,891 INFO L93 Difference]: Finished difference Result 214 states and 222 transitions. [2022-01-31 17:48:15,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:48:15,892 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 86 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 17:48:15,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:15,892 INFO L225 Difference]: With dead ends: 214 [2022-01-31 17:48:15,892 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 17:48:15,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:48:15,894 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 187 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:15,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 65 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 17:48:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-01-31 17:48:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 188 states have (on average 1.0265957446808511) internal successors, (193), 188 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-01-31 17:48:15,941 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 187 [2022-01-31 17:48:15,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:15,941 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-01-31 17:48:15,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 86 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-01-31 17:48:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 17:48:15,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:15,943 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:15,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:48:15,943 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:15,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:15,943 INFO L85 PathProgramCache]: Analyzing trace with hash 333019282, now seen corresponding path program 84 times [2022-01-31 17:48:15,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:15,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701061656] [2022-01-31 17:48:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:15,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:15,945 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:15,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:15,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:18,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:18,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:18,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701061656] [2022-01-31 17:48:18,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [701061656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:18,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:18,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:48:18,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228952563] [2022-01-31 17:48:18,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:18,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:48:18,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:18,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:48:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:48:18,306 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 88 states, 88 states have (on average 2.0681818181818183) internal successors, (182), 87 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:21,263 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2022-01-31 17:48:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:48:21,263 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0681818181818183) internal successors, (182), 87 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-01-31 17:48:21,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:21,264 INFO L225 Difference]: With dead ends: 216 [2022-01-31 17:48:21,264 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 17:48:21,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:48:21,265 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 189 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:21,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 70 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 17:48:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-01-31 17:48:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.0263157894736843) internal successors, (195), 190 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 17:48:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2022-01-31 17:48:21,310 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 189 [2022-01-31 17:48:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:21,310 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2022-01-31 17:48:21,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0681818181818183) internal successors, (182), 87 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2022-01-31 17:48:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:48:21,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:21,311 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:21,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:48:21,311 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:21,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:21,311 INFO L85 PathProgramCache]: Analyzing trace with hash -73604432, now seen corresponding path program 85 times [2022-01-31 17:48:21,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:21,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239605611] [2022-01-31 17:48:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:21,313 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:21,313 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:21,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:21,318 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:23,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:23,746 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:23,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239605611] [2022-01-31 17:48:23,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [239605611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:23,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:23,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:48:23,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231173603] [2022-01-31 17:48:23,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:23,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:48:23,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:48:23,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:48:23,756 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand has 89 states, 89 states have (on average 2.067415730337079) internal successors, (184), 88 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:26,669 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2022-01-31 17:48:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:48:26,670 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.067415730337079) internal successors, (184), 88 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 17:48:26,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:26,670 INFO L225 Difference]: With dead ends: 218 [2022-01-31 17:48:26,670 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 17:48:26,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:48:26,672 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 191 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:26,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 35 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 17:48:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-01-31 17:48:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 192 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2022-01-31 17:48:26,726 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 191 [2022-01-31 17:48:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:26,726 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2022-01-31 17:48:26,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.067415730337079) internal successors, (184), 88 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2022-01-31 17:48:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 17:48:26,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:26,727 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:26,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:48:26,727 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:26,727 INFO L85 PathProgramCache]: Analyzing trace with hash 3030350, now seen corresponding path program 86 times [2022-01-31 17:48:26,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:26,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489315666] [2022-01-31 17:48:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:26,729 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:26,729 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:26,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:26,733 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:29,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:29,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:29,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489315666] [2022-01-31 17:48:29,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489315666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:29,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:29,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:48:29,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128908213] [2022-01-31 17:48:29,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:29,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:48:29,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:29,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:48:29,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:48:29,191 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:32,195 INFO L93 Difference]: Finished difference Result 220 states and 228 transitions. [2022-01-31 17:48:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:48:32,195 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-01-31 17:48:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:32,196 INFO L225 Difference]: With dead ends: 220 [2022-01-31 17:48:32,196 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 17:48:32,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:48:32,197 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 193 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:32,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 40 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 17:48:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-01-31 17:48:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.0257731958762886) internal successors, (199), 194 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2022-01-31 17:48:32,244 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 193 [2022-01-31 17:48:32,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:32,245 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2022-01-31 17:48:32,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:32,245 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2022-01-31 17:48:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:48:32,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:32,245 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:32,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:48:32,246 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:32,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:32,246 INFO L85 PathProgramCache]: Analyzing trace with hash 634611820, now seen corresponding path program 87 times [2022-01-31 17:48:32,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:32,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030722062] [2022-01-31 17:48:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:32,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:32,248 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:32,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:32,252 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:34,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:34,781 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:34,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030722062] [2022-01-31 17:48:34,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1030722062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:34,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:34,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:48:34,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981808207] [2022-01-31 17:48:34,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:34,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:48:34,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:34,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:48:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:48:34,783 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 91 states, 91 states have (on average 2.065934065934066) internal successors, (188), 90 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:37,866 INFO L93 Difference]: Finished difference Result 222 states and 230 transitions. [2022-01-31 17:48:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:48:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.065934065934066) internal successors, (188), 90 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 17:48:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:37,866 INFO L225 Difference]: With dead ends: 222 [2022-01-31 17:48:37,867 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 17:48:37,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:48:37,868 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 195 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:37,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 55 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 17:48:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-01-31 17:48:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.0255102040816326) internal successors, (201), 196 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2022-01-31 17:48:37,943 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 195 [2022-01-31 17:48:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:37,944 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2022-01-31 17:48:37,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.065934065934066) internal successors, (188), 90 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:37,944 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2022-01-31 17:48:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 17:48:37,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:37,945 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:37,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:48:37,945 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:37,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:37,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1994015754, now seen corresponding path program 88 times [2022-01-31 17:48:37,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:37,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952871605] [2022-01-31 17:48:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:37,947 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:37,947 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:37,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:37,952 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:40,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:40,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:40,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952871605] [2022-01-31 17:48:40,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [952871605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:40,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:40,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:48:40,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742849324] [2022-01-31 17:48:40,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:40,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:48:40,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:40,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:48:40,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:48:40,572 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand has 92 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 91 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:43,699 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2022-01-31 17:48:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:48:43,699 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 91 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-01-31 17:48:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:43,700 INFO L225 Difference]: With dead ends: 224 [2022-01-31 17:48:43,700 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 17:48:43,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:48:43,701 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 197 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:43,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 45 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:43,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 17:48:43,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-01-31 17:48:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.0252525252525253) internal successors, (203), 198 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 17:48:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2022-01-31 17:48:43,778 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 197 [2022-01-31 17:48:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:43,778 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2022-01-31 17:48:43,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 91 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2022-01-31 17:48:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 17:48:43,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:43,779 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:43,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:48:43,779 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1583828952, now seen corresponding path program 89 times [2022-01-31 17:48:43,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:43,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094553417] [2022-01-31 17:48:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:43,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:43,781 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:43,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:43,787 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:46,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:46,423 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:46,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094553417] [2022-01-31 17:48:46,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2094553417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:46,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:46,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:48:46,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72840763] [2022-01-31 17:48:46,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:46,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:48:46,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:46,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:48:46,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:48:46,429 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 93 states, 93 states have (on average 2.064516129032258) internal successors, (192), 92 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:49,632 INFO L93 Difference]: Finished difference Result 226 states and 234 transitions. [2022-01-31 17:48:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:48:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.064516129032258) internal successors, (192), 92 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 17:48:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:49,633 INFO L225 Difference]: With dead ends: 226 [2022-01-31 17:48:49,633 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 17:48:49,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:48:49,635 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 199 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:49,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 65 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 17:48:49,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-01-31 17:48:49,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 200 states have (on average 1.025) internal successors, (205), 200 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:49,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2022-01-31 17:48:49,693 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 199 [2022-01-31 17:48:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:49,693 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2022-01-31 17:48:49,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.064516129032258) internal successors, (192), 92 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:49,694 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2022-01-31 17:48:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 17:48:49,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:49,694 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:49,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:48:49,694 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:49,695 INFO L85 PathProgramCache]: Analyzing trace with hash 376212678, now seen corresponding path program 90 times [2022-01-31 17:48:49,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:49,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585011157] [2022-01-31 17:48:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:49,696 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:49,696 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:49,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:49,700 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:52,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:52,376 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 17:48:52,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:52,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585011157] [2022-01-31 17:48:52,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [585011157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:52,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:52,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:48:52,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186586672] [2022-01-31 17:48:52,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:52,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:48:52,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:52,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:48:52,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:48:52,378 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:55,637 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2022-01-31 17:48:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:48:55,637 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 17:48:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:55,638 INFO L225 Difference]: With dead ends: 228 [2022-01-31 17:48:55,638 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 17:48:55,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:48:55,639 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 201 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:55,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 45 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 17:48:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-01-31 17:48:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.0247524752475248) internal successors, (207), 202 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2022-01-31 17:48:55,691 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 201 [2022-01-31 17:48:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:55,691 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2022-01-31 17:48:55,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2022-01-31 17:48:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:48:55,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:55,692 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:55,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:48:55,692 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1514423836, now seen corresponding path program 91 times [2022-01-31 17:48:55,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776701677] [2022-01-31 17:48:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:55,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:55,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:55,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:55,698 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:58,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:58,428 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:58,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776701677] [2022-01-31 17:48:58,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [776701677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:58,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:58,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:48:58,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642742506] [2022-01-31 17:48:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:58,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:48:58,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:58,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:48:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:48:58,430 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand has 95 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 94 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:01,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:01,755 INFO L93 Difference]: Finished difference Result 230 states and 238 transitions. [2022-01-31 17:49:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:49:01,755 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 94 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 17:49:01,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:01,756 INFO L225 Difference]: With dead ends: 230 [2022-01-31 17:49:01,756 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 17:49:01,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:49:01,757 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 203 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:01,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 40 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:49:01,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 17:49:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-01-31 17:49:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 204 states have (on average 1.0245098039215685) internal successors, (209), 204 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2022-01-31 17:49:01,811 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 203 [2022-01-31 17:49:01,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:01,811 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2022-01-31 17:49:01,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 94 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:01,811 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2022-01-31 17:49:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 17:49:01,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:01,812 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:01,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:49:01,812 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1644947582, now seen corresponding path program 92 times [2022-01-31 17:49:01,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:01,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944673438] [2022-01-31 17:49:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:01,814 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:01,814 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:01,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:01,819 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:04,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:04,598 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:04,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944673438] [2022-01-31 17:49:04,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [944673438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:04,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:04,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:49:04,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459529296] [2022-01-31 17:49:04,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:04,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:49:04,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:04,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:49:04,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:49:04,601 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand has 96 states, 96 states have (on average 2.0625) internal successors, (198), 95 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:08,005 INFO L93 Difference]: Finished difference Result 232 states and 240 transitions. [2022-01-31 17:49:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:49:08,005 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0625) internal successors, (198), 95 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-01-31 17:49:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:08,006 INFO L225 Difference]: With dead ends: 232 [2022-01-31 17:49:08,006 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 17:49:08,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:49:08,007 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 205 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:08,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 60 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:49:08,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 17:49:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-01-31 17:49:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.0242718446601942) internal successors, (211), 206 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 17:49:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2022-01-31 17:49:08,071 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 205 [2022-01-31 17:49:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:08,071 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2022-01-31 17:49:08,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0625) internal successors, (198), 95 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2022-01-31 17:49:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:49:08,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:08,072 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:08,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:49:08,072 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:08,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1770751392, now seen corresponding path program 93 times [2022-01-31 17:49:08,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:08,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700883679] [2022-01-31 17:49:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:08,074 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:08,074 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:08,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:08,078 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:10,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:10,924 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700883679] [2022-01-31 17:49:10,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700883679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:10,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:10,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:49:10,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72801718] [2022-01-31 17:49:10,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:10,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:49:10,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:10,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:49:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:49:10,927 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 96 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:14,433 INFO L93 Difference]: Finished difference Result 234 states and 242 transitions. [2022-01-31 17:49:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:49:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 96 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 17:49:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:14,434 INFO L225 Difference]: With dead ends: 234 [2022-01-31 17:49:14,434 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 17:49:14,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:49:14,436 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 207 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:14,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 60 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:49:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 17:49:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-01-31 17:49:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.0240384615384615) internal successors, (213), 208 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2022-01-31 17:49:14,536 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 207 [2022-01-31 17:49:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:14,536 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2022-01-31 17:49:14,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 96 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2022-01-31 17:49:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 17:49:14,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:14,537 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:14,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:49:14,538 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:14,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1392516034, now seen corresponding path program 94 times [2022-01-31 17:49:14,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:14,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668223568] [2022-01-31 17:49:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:14,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:14,540 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:14,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:14,546 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:17,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:17,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:17,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668223568] [2022-01-31 17:49:17,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668223568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:17,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:17,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:49:17,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338763908] [2022-01-31 17:49:17,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:17,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:49:17,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:17,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:49:17,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:49:17,479 INFO L87 Difference]: Start difference. First operand 214 states and 218 transitions. Second operand has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:21,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:21,005 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2022-01-31 17:49:21,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:49:21,005 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 17:49:21,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:21,006 INFO L225 Difference]: With dead ends: 236 [2022-01-31 17:49:21,006 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 17:49:21,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:49:21,008 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 209 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:21,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 55 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:49:21,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 17:49:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-01-31 17:49:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.0238095238095237) internal successors, (215), 210 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2022-01-31 17:49:21,097 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 209 [2022-01-31 17:49:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:21,097 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2022-01-31 17:49:21,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2022-01-31 17:49:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:49:21,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:21,098 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:21,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:49:21,098 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -455666852, now seen corresponding path program 95 times [2022-01-31 17:49:21,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:21,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711714768] [2022-01-31 17:49:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:21,100 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:21,100 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:21,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:21,107 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:24,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:24,071 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711714768] [2022-01-31 17:49:24,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [711714768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:24,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:24,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:49:24,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695181968] [2022-01-31 17:49:24,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:24,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:49:24,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:24,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:49:24,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:49:24,075 INFO L87 Difference]: Start difference. First operand 216 states and 220 transitions. Second operand has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:27,666 INFO L93 Difference]: Finished difference Result 238 states and 246 transitions. [2022-01-31 17:49:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:49:27,666 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 17:49:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:27,676 INFO L225 Difference]: With dead ends: 238 [2022-01-31 17:49:27,676 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 17:49:27,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:49:27,677 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 211 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:27,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 40 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:49:27,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 17:49:27,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2022-01-31 17:49:27,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 212 states have (on average 1.0235849056603774) internal successors, (217), 212 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 222 transitions. [2022-01-31 17:49:27,733 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 222 transitions. Word has length 211 [2022-01-31 17:49:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:27,733 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 222 transitions. [2022-01-31 17:49:27,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 222 transitions. [2022-01-31 17:49:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 17:49:27,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:27,734 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:27,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:49:27,735 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:27,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:27,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2086735110, now seen corresponding path program 96 times [2022-01-31 17:49:27,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:27,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324657364] [2022-01-31 17:49:27,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:27,737 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:27,737 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:27,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:27,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:30,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:30,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:30,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324657364] [2022-01-31 17:49:30,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324657364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:30,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:30,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:49:30,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246281547] [2022-01-31 17:49:30,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:30,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:49:30,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:30,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:49:30,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:49:30,756 INFO L87 Difference]: Start difference. First operand 218 states and 222 transitions. Second operand has 100 states, 100 states have (on average 2.06) internal successors, (206), 99 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:34,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:34,452 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2022-01-31 17:49:34,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:49:34,452 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.06) internal successors, (206), 99 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-01-31 17:49:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:34,453 INFO L225 Difference]: With dead ends: 240 [2022-01-31 17:49:34,453 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 17:49:34,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:49:34,455 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 213 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:34,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 55 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:49:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 17:49:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-01-31 17:49:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.0233644859813085) internal successors, (219), 214 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 17:49:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2022-01-31 17:49:34,515 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 213 [2022-01-31 17:49:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:34,515 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2022-01-31 17:49:34,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.06) internal successors, (206), 99 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2022-01-31 17:49:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:49:34,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:34,516 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:34,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:49:34,516 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1880268008, now seen corresponding path program 97 times [2022-01-31 17:49:34,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:34,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162075058] [2022-01-31 17:49:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:34,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:34,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:34,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:34,523 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:37,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:37,619 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:37,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162075058] [2022-01-31 17:49:37,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [162075058] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:37,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:37,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:49:37,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881448009] [2022-01-31 17:49:37,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:37,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:49:37,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:37,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:49:37,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:49:37,622 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 100 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:41,324 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2022-01-31 17:49:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:49:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 100 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 17:49:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:41,325 INFO L225 Difference]: With dead ends: 242 [2022-01-31 17:49:41,325 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 17:49:41,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:49:41,327 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 215 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:41,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 35 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:49:41,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 17:49:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2022-01-31 17:49:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 216 states have (on average 1.0231481481481481) internal successors, (221), 216 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 226 transitions. [2022-01-31 17:49:41,389 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 226 transitions. Word has length 215 [2022-01-31 17:49:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:41,389 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 226 transitions. [2022-01-31 17:49:41,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 100 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 226 transitions. [2022-01-31 17:49:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 17:49:41,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:41,390 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:41,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:49:41,390 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1033878602, now seen corresponding path program 98 times [2022-01-31 17:49:41,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:41,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413013612] [2022-01-31 17:49:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:41,392 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:41,392 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:41,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:41,397 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:44,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:44,567 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:44,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413013612] [2022-01-31 17:49:44,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1413013612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:44,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:44,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:49:44,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381659690] [2022-01-31 17:49:44,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:44,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:49:44,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:44,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:49:44,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:49:44,570 INFO L87 Difference]: Start difference. First operand 222 states and 226 transitions. Second operand has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:48,394 INFO L93 Difference]: Finished difference Result 244 states and 252 transitions. [2022-01-31 17:49:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:49:48,395 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-01-31 17:49:48,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:48,395 INFO L225 Difference]: With dead ends: 244 [2022-01-31 17:49:48,395 INFO L226 Difference]: Without dead ends: 225 [2022-01-31 17:49:48,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:49:48,397 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 217 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:48,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 55 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:49:48,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-31 17:49:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-01-31 17:49:48,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.0229357798165137) internal successors, (223), 218 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 228 transitions. [2022-01-31 17:49:48,470 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 228 transitions. Word has length 217 [2022-01-31 17:49:48,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:48,470 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 228 transitions. [2022-01-31 17:49:48,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 228 transitions. [2022-01-31 17:49:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:49:48,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:48,471 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:48,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:49:48,471 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:48,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash 597521620, now seen corresponding path program 99 times [2022-01-31 17:49:48,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:48,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996234751] [2022-01-31 17:49:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:48,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:48,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:48,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:48,478 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:51,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:51,692 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:51,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996234751] [2022-01-31 17:49:51,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1996234751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:51,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:51,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:49:51,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537176256] [2022-01-31 17:49:51,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:51,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:49:51,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:51,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:49:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:49:51,695 INFO L87 Difference]: Start difference. First operand 224 states and 228 transitions. Second operand has 103 states, 103 states have (on average 2.058252427184466) internal successors, (212), 102 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:55,597 INFO L93 Difference]: Finished difference Result 246 states and 254 transitions. [2022-01-31 17:49:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:49:55,597 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.058252427184466) internal successors, (212), 102 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 17:49:55,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:55,598 INFO L225 Difference]: With dead ends: 246 [2022-01-31 17:49:55,598 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 17:49:55,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:49:55,599 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 219 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:55,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 55 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:49:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 17:49:55,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-01-31 17:49:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.0227272727272727) internal successors, (225), 220 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 230 transitions. [2022-01-31 17:49:55,694 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 230 transitions. Word has length 219 [2022-01-31 17:49:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:55,695 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 230 transitions. [2022-01-31 17:49:55,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.058252427184466) internal successors, (212), 102 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:55,695 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 230 transitions. [2022-01-31 17:49:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 17:49:55,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:55,696 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:55,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:49:55,696 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:55,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:55,696 INFO L85 PathProgramCache]: Analyzing trace with hash 710071922, now seen corresponding path program 100 times [2022-01-31 17:49:55,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:55,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184468492] [2022-01-31 17:49:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:55,703 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:55,703 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:55,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:55,710 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:59,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:59,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:59,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184468492] [2022-01-31 17:49:59,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [184468492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:59,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:59,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:49:59,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359220699] [2022-01-31 17:49:59,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:59,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:49:59,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:49:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:49:59,019 INFO L87 Difference]: Start difference. First operand 226 states and 230 transitions. Second operand has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 103 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:02,985 INFO L93 Difference]: Finished difference Result 248 states and 256 transitions. [2022-01-31 17:50:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:50:02,986 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 103 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-01-31 17:50:02,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:02,986 INFO L225 Difference]: With dead ends: 248 [2022-01-31 17:50:02,986 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 17:50:02,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:50:02,989 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 221 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:02,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 50 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:50:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 17:50:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-01-31 17:50:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 222 states have (on average 1.0225225225225225) internal successors, (227), 222 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 17:50:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 232 transitions. [2022-01-31 17:50:03,096 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 232 transitions. Word has length 221 [2022-01-31 17:50:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:03,097 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 232 transitions. [2022-01-31 17:50:03,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 103 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 232 transitions. [2022-01-31 17:50:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 17:50:03,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:03,098 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:03,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:50:03,098 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:03,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1496729744, now seen corresponding path program 101 times [2022-01-31 17:50:03,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:03,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172400263] [2022-01-31 17:50:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:03,100 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:03,100 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:03,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:03,107 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:06,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:06,434 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:06,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172400263] [2022-01-31 17:50:06,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172400263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:06,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:06,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:50:06,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172322600] [2022-01-31 17:50:06,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:06,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:50:06,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:06,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:50:06,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:50:06,437 INFO L87 Difference]: Start difference. First operand 228 states and 232 transitions. Second operand has 105 states, 105 states have (on average 2.057142857142857) internal successors, (216), 104 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:10,457 INFO L93 Difference]: Finished difference Result 250 states and 258 transitions. [2022-01-31 17:50:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:50:10,458 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.057142857142857) internal successors, (216), 104 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-01-31 17:50:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:10,458 INFO L225 Difference]: With dead ends: 250 [2022-01-31 17:50:10,458 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 17:50:10,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:50:10,460 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 223 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:10,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 50 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:50:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 17:50:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2022-01-31 17:50:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 224 states have (on average 1.0223214285714286) internal successors, (229), 224 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 234 transitions. [2022-01-31 17:50:10,523 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 234 transitions. Word has length 223 [2022-01-31 17:50:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:10,523 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 234 transitions. [2022-01-31 17:50:10,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.057142857142857) internal successors, (216), 104 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 234 transitions. [2022-01-31 17:50:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 17:50:10,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:10,524 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:10,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:50:10,524 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:10,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1560652590, now seen corresponding path program 102 times [2022-01-31 17:50:10,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:10,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181389544] [2022-01-31 17:50:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:10,526 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:10,526 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:10,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:10,532 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:13,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:13,928 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:13,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181389544] [2022-01-31 17:50:13,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1181389544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:13,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:13,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:50:13,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481162073] [2022-01-31 17:50:13,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:13,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:50:13,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:13,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:50:13,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:50:13,930 INFO L87 Difference]: Start difference. First operand 230 states and 234 transitions. Second operand has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:18,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:18,072 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2022-01-31 17:50:18,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:50:18,072 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-01-31 17:50:18,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:18,073 INFO L225 Difference]: With dead ends: 252 [2022-01-31 17:50:18,073 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 17:50:18,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:50:18,086 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 225 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:18,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 55 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:50:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 17:50:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2022-01-31 17:50:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0221238938053097) internal successors, (231), 226 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 236 transitions. [2022-01-31 17:50:18,150 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 236 transitions. Word has length 225 [2022-01-31 17:50:18,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:18,150 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 236 transitions. [2022-01-31 17:50:18,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 236 transitions. [2022-01-31 17:50:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:50:18,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:18,151 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:18,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:50:18,151 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:18,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:18,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1434001844, now seen corresponding path program 103 times [2022-01-31 17:50:18,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:18,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345825930] [2022-01-31 17:50:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:18,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:18,152 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:18,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:18,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:21,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:21,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:21,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345825930] [2022-01-31 17:50:21,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1345825930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:21,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:21,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:50:21,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299383589] [2022-01-31 17:50:21,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:21,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:50:21,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:21,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:50:21,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:50:21,620 INFO L87 Difference]: Start difference. First operand 232 states and 236 transitions. Second operand has 107 states, 107 states have (on average 2.05607476635514) internal successors, (220), 106 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:25,811 INFO L93 Difference]: Finished difference Result 254 states and 262 transitions. [2022-01-31 17:50:25,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:50:25,811 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.05607476635514) internal successors, (220), 106 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 17:50:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:25,812 INFO L225 Difference]: With dead ends: 254 [2022-01-31 17:50:25,812 INFO L226 Difference]: Without dead ends: 235 [2022-01-31 17:50:25,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:50:25,815 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 227 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:25,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 50 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:50:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-31 17:50:25,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2022-01-31 17:50:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 228 states have (on average 1.0219298245614035) internal successors, (233), 228 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 238 transitions. [2022-01-31 17:50:25,896 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 238 transitions. Word has length 227 [2022-01-31 17:50:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:25,897 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 238 transitions. [2022-01-31 17:50:25,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.05607476635514) internal successors, (220), 106 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 238 transitions. [2022-01-31 17:50:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 17:50:25,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:25,898 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:25,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:50:25,898 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:25,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1668824598, now seen corresponding path program 104 times [2022-01-31 17:50:25,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:25,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399907568] [2022-01-31 17:50:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:25,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:25,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:25,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:25,905 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:29,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:29,407 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399907568] [2022-01-31 17:50:29,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [399907568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:29,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:29,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:50:29,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972490650] [2022-01-31 17:50:29,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:29,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:50:29,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:50:29,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:50:29,416 INFO L87 Difference]: Start difference. First operand 234 states and 238 transitions. Second operand has 108 states, 108 states have (on average 2.0555555555555554) internal successors, (222), 107 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:33,669 INFO L93 Difference]: Finished difference Result 256 states and 264 transitions. [2022-01-31 17:50:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:50:33,669 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0555555555555554) internal successors, (222), 107 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-01-31 17:50:33,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:33,670 INFO L225 Difference]: With dead ends: 256 [2022-01-31 17:50:33,670 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 17:50:33,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:50:33,672 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 229 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:33,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 55 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:50:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 17:50:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2022-01-31 17:50:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.0217391304347827) internal successors, (235), 230 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 17:50:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 240 transitions. [2022-01-31 17:50:33,750 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 240 transitions. Word has length 229 [2022-01-31 17:50:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:33,750 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 240 transitions. [2022-01-31 17:50:33,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0555555555555554) internal successors, (222), 107 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 240 transitions. [2022-01-31 17:50:33,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:50:33,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:33,751 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:33,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:50:33,751 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:33,751 INFO L85 PathProgramCache]: Analyzing trace with hash 299775496, now seen corresponding path program 105 times [2022-01-31 17:50:33,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:33,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443406237] [2022-01-31 17:50:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:33,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:33,752 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:33,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:33,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:37,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:37,356 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:37,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443406237] [2022-01-31 17:50:37,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1443406237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:37,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:37,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:50:37,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631404380] [2022-01-31 17:50:37,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:37,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:50:37,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:37,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:50:37,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:50:37,359 INFO L87 Difference]: Start difference. First operand 236 states and 240 transitions. Second operand has 109 states, 109 states have (on average 2.055045871559633) internal successors, (224), 108 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:41,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:41,726 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2022-01-31 17:50:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:50:41,726 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.055045871559633) internal successors, (224), 108 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 17:50:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:41,727 INFO L225 Difference]: With dead ends: 258 [2022-01-31 17:50:41,727 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 17:50:41,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:50:41,729 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 231 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:41,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 45 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:50:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 17:50:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-01-31 17:50:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.021551724137931) internal successors, (237), 232 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 242 transitions. [2022-01-31 17:50:41,807 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 242 transitions. Word has length 231 [2022-01-31 17:50:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:41,808 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 242 transitions. [2022-01-31 17:50:41,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.055045871559633) internal successors, (224), 108 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 242 transitions. [2022-01-31 17:50:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 17:50:41,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:41,808 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:41,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:50:41,809 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:41,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1956111706, now seen corresponding path program 106 times [2022-01-31 17:50:41,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:41,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287895025] [2022-01-31 17:50:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:41,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:41,810 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:41,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:41,816 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:45,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:45,519 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 17:50:45,519 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:45,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287895025] [2022-01-31 17:50:45,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [287895025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:45,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:45,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:50:45,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617076911] [2022-01-31 17:50:45,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:45,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:50:45,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:50:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:50:45,522 INFO L87 Difference]: Start difference. First operand 238 states and 242 transitions. Second operand has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:49,926 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2022-01-31 17:50:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:50:49,926 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-01-31 17:50:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:49,927 INFO L225 Difference]: With dead ends: 260 [2022-01-31 17:50:49,927 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 17:50:49,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:50:49,929 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 233 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:49,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 55 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:50:49,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 17:50:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2022-01-31 17:50:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.0213675213675213) internal successors, (239), 234 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 244 transitions. [2022-01-31 17:50:50,008 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 244 transitions. Word has length 233 [2022-01-31 17:50:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:50,009 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 244 transitions. [2022-01-31 17:50:50,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 244 transitions. [2022-01-31 17:50:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:50:50,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:50,009 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:50,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:50:50,010 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:50,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:50,010 INFO L85 PathProgramCache]: Analyzing trace with hash -905228348, now seen corresponding path program 107 times [2022-01-31 17:50:50,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:50,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261629110] [2022-01-31 17:50:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:50,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:50,011 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:50,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:50,018 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:53,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:53,731 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:53,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261629110] [2022-01-31 17:50:53,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1261629110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:53,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:53,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:50:53,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397962954] [2022-01-31 17:50:53,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:53,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:50:53,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:53,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:50:53,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:50:53,733 INFO L87 Difference]: Start difference. First operand 240 states and 244 transitions. Second operand has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 110 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:58,219 INFO L93 Difference]: Finished difference Result 262 states and 270 transitions. [2022-01-31 17:50:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:50:58,219 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 110 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 17:50:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:58,220 INFO L225 Difference]: With dead ends: 262 [2022-01-31 17:50:58,220 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 17:50:58,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:50:58,222 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 235 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:58,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 50 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:50:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 17:50:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2022-01-31 17:50:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 236 states have (on average 1.021186440677966) internal successors, (241), 236 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 246 transitions. [2022-01-31 17:50:58,304 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 246 transitions. Word has length 235 [2022-01-31 17:50:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:58,304 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 246 transitions. [2022-01-31 17:50:58,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 110 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 246 transitions. [2022-01-31 17:50:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 17:50:58,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:58,305 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:58,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:50:58,305 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:58,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash -323635870, now seen corresponding path program 108 times [2022-01-31 17:50:58,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:58,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328906843] [2022-01-31 17:50:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:58,306 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:58,306 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:58,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:58,312 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:02,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:02,100 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:02,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328906843] [2022-01-31 17:51:02,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1328906843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:02,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:02,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:51:02,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517996497] [2022-01-31 17:51:02,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:02,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:51:02,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:02,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:51:02,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:51:02,102 INFO L87 Difference]: Start difference. First operand 242 states and 246 transitions. Second operand has 112 states, 112 states have (on average 2.0535714285714284) internal successors, (230), 111 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:06,657 INFO L93 Difference]: Finished difference Result 264 states and 272 transitions. [2022-01-31 17:51:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:51:06,657 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0535714285714284) internal successors, (230), 111 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 237 [2022-01-31 17:51:06,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:06,658 INFO L225 Difference]: With dead ends: 264 [2022-01-31 17:51:06,658 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 17:51:06,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:51:06,660 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 237 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:06,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 55 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:51:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 17:51:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-01-31 17:51:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.0210084033613445) internal successors, (243), 238 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 17:51:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 248 transitions. [2022-01-31 17:51:06,743 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 248 transitions. Word has length 237 [2022-01-31 17:51:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:06,743 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 248 transitions. [2022-01-31 17:51:06,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0535714285714284) internal successors, (230), 111 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 248 transitions. [2022-01-31 17:51:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 17:51:06,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:06,744 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:06,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:51:06,744 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash 240987008, now seen corresponding path program 109 times [2022-01-31 17:51:06,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:06,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106509950] [2022-01-31 17:51:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:06,746 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:06,746 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:06,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:06,751 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:10,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:10,594 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:10,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106509950] [2022-01-31 17:51:10,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2106509950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:10,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:10,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:51:10,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138052301] [2022-01-31 17:51:10,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:10,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:51:10,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:51:10,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:51:10,596 INFO L87 Difference]: Start difference. First operand 244 states and 248 transitions. Second operand has 113 states, 113 states have (on average 2.0530973451327434) internal successors, (232), 112 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:15,233 INFO L93 Difference]: Finished difference Result 266 states and 274 transitions. [2022-01-31 17:51:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:51:15,233 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0530973451327434) internal successors, (232), 112 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 17:51:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:15,234 INFO L225 Difference]: With dead ends: 266 [2022-01-31 17:51:15,234 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 17:51:15,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:51:15,236 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 239 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:15,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 55 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:51:15,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 17:51:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-01-31 17:51:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 240 states have (on average 1.0208333333333333) internal successors, (245), 240 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 250 transitions. [2022-01-31 17:51:15,309 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 250 transitions. Word has length 239 [2022-01-31 17:51:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:15,309 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 250 transitions. [2022-01-31 17:51:15,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0530973451327434) internal successors, (232), 112 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 250 transitions. [2022-01-31 17:51:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 17:51:15,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:15,310 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:15,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:51:15,310 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:15,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:15,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1677693470, now seen corresponding path program 110 times [2022-01-31 17:51:15,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:15,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867282998] [2022-01-31 17:51:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:15,311 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:15,311 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:15,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:15,318 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:19,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:19,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:19,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867282998] [2022-01-31 17:51:19,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [867282998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:19,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:19,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:51:19,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017251070] [2022-01-31 17:51:19,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:19,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:51:19,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:51:19,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:51:19,235 INFO L87 Difference]: Start difference. First operand 246 states and 250 transitions. Second operand has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:23,991 INFO L93 Difference]: Finished difference Result 268 states and 276 transitions. [2022-01-31 17:51:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:51:23,991 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-01-31 17:51:23,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:23,992 INFO L225 Difference]: With dead ends: 268 [2022-01-31 17:51:23,992 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 17:51:23,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:51:23,994 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 241 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:23,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 60 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:51:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 17:51:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2022-01-31 17:51:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.0206611570247934) internal successors, (247), 242 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 252 transitions. [2022-01-31 17:51:24,080 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 252 transitions. Word has length 241 [2022-01-31 17:51:24,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:24,080 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 252 transitions. [2022-01-31 17:51:24,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:24,080 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 252 transitions. [2022-01-31 17:51:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:51:24,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:24,081 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:24,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:51:24,081 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:24,082 INFO L85 PathProgramCache]: Analyzing trace with hash -626865860, now seen corresponding path program 111 times [2022-01-31 17:51:24,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:24,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259624464] [2022-01-31 17:51:24,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:24,083 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:24,083 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:24,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:24,089 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:28,078 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259624464] [2022-01-31 17:51:28,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259624464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:28,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:28,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:51:28,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406845445] [2022-01-31 17:51:28,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:28,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:51:28,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:28,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:51:28,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:51:28,081 INFO L87 Difference]: Start difference. First operand 248 states and 252 transitions. Second operand has 115 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 114 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:32,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:32,910 INFO L93 Difference]: Finished difference Result 270 states and 278 transitions. [2022-01-31 17:51:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:51:32,911 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 114 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 17:51:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:32,911 INFO L225 Difference]: With dead ends: 270 [2022-01-31 17:51:32,911 INFO L226 Difference]: Without dead ends: 251 [2022-01-31 17:51:32,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:51:32,913 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:32,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 50 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:51:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-31 17:51:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2022-01-31 17:51:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 244 states have (on average 1.0204918032786885) internal successors, (249), 244 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:32,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 254 transitions. [2022-01-31 17:51:32,989 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 254 transitions. Word has length 243 [2022-01-31 17:51:32,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:32,989 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 254 transitions. [2022-01-31 17:51:32,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 114 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:32,989 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 254 transitions. [2022-01-31 17:51:32,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 17:51:32,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:32,990 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:32,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:51:32,990 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash 894742746, now seen corresponding path program 112 times [2022-01-31 17:51:32,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:32,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479522810] [2022-01-31 17:51:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:33,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:33,001 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:33,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:33,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:37,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:37,045 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:37,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479522810] [2022-01-31 17:51:37,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479522810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:37,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:37,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:51:37,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851580531] [2022-01-31 17:51:37,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:37,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:51:37,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:51:37,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:51:37,048 INFO L87 Difference]: Start difference. First operand 250 states and 254 transitions. Second operand has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 115 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:41,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:41,952 INFO L93 Difference]: Finished difference Result 272 states and 280 transitions. [2022-01-31 17:51:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:51:41,953 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 115 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-01-31 17:51:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:41,953 INFO L225 Difference]: With dead ends: 272 [2022-01-31 17:51:41,953 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 17:51:41,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:51:41,956 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 245 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:41,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 35 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:51:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 17:51:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2022-01-31 17:51:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.0203252032520325) internal successors, (251), 246 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 17:51:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 256 transitions. [2022-01-31 17:51:42,044 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 256 transitions. Word has length 245 [2022-01-31 17:51:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:42,044 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 256 transitions. [2022-01-31 17:51:42,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 115 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 256 transitions. [2022-01-31 17:51:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 17:51:42,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:42,045 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:42,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:51:42,045 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:42,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1423234824, now seen corresponding path program 113 times [2022-01-31 17:51:42,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:42,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837577555] [2022-01-31 17:51:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:42,046 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:42,046 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:42,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:42,053 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:46,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:46,182 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:46,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837577555] [2022-01-31 17:51:46,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [837577555] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:46,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:46,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:51:46,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20659311] [2022-01-31 17:51:46,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:46,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:51:46,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:46,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:51:46,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:51:46,184 INFO L87 Difference]: Start difference. First operand 252 states and 256 transitions. Second operand has 117 states, 117 states have (on average 2.051282051282051) internal successors, (240), 116 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:51,192 INFO L93 Difference]: Finished difference Result 274 states and 282 transitions. [2022-01-31 17:51:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:51:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.051282051282051) internal successors, (240), 116 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-01-31 17:51:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:51,193 INFO L225 Difference]: With dead ends: 274 [2022-01-31 17:51:51,193 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 17:51:51,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:51:51,195 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 247 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:51,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 55 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:51:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 17:51:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2022-01-31 17:51:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 248 states have (on average 1.0201612903225807) internal successors, (253), 248 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 258 transitions. [2022-01-31 17:51:51,283 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 258 transitions. Word has length 247 [2022-01-31 17:51:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:51,283 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 258 transitions. [2022-01-31 17:51:51,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.051282051282051) internal successors, (240), 116 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 258 transitions. [2022-01-31 17:51:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 17:51:51,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:51,284 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:51,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:51:51,284 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash 88347030, now seen corresponding path program 114 times [2022-01-31 17:51:51,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:51,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549919666] [2022-01-31 17:51:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:51,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:51,285 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:51,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:51,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:55,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:55,558 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:55,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549919666] [2022-01-31 17:51:55,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549919666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:55,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:55,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:51:55,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701542229] [2022-01-31 17:51:55,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:55,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:51:55,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:51:55,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:51:55,560 INFO L87 Difference]: Start difference. First operand 254 states and 258 transitions. Second operand has 118 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 117 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:00,630 INFO L93 Difference]: Finished difference Result 276 states and 284 transitions. [2022-01-31 17:52:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:52:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 117 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-01-31 17:52:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:00,630 INFO L225 Difference]: With dead ends: 276 [2022-01-31 17:52:00,630 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 17:52:00,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:52:00,633 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 249 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:00,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 35 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:52:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 17:52:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2022-01-31 17:52:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.02) internal successors, (255), 250 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 260 transitions. [2022-01-31 17:52:00,743 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 260 transitions. Word has length 249 [2022-01-31 17:52:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:00,743 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 260 transitions. [2022-01-31 17:52:00,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 117 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 260 transitions. [2022-01-31 17:52:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:52:00,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:00,744 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:00,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:52:00,744 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1019562676, now seen corresponding path program 115 times [2022-01-31 17:52:00,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:00,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144351714] [2022-01-31 17:52:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:00,745 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:00,745 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:00,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:00,752 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:05,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:05,044 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:05,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144351714] [2022-01-31 17:52:05,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1144351714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:05,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:05,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:52:05,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602609157] [2022-01-31 17:52:05,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:05,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:52:05,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:05,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:52:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:52:05,046 INFO L87 Difference]: Start difference. First operand 256 states and 260 transitions. Second operand has 119 states, 119 states have (on average 2.0504201680672267) internal successors, (244), 118 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:10,208 INFO L93 Difference]: Finished difference Result 278 states and 286 transitions. [2022-01-31 17:52:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:52:10,208 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0504201680672267) internal successors, (244), 118 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 17:52:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:10,209 INFO L225 Difference]: With dead ends: 278 [2022-01-31 17:52:10,209 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 17:52:10,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:52:10,211 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 251 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:10,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 40 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:52:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 17:52:10,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2022-01-31 17:52:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 252 states have (on average 1.0198412698412698) internal successors, (257), 252 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 262 transitions. [2022-01-31 17:52:10,308 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 262 transitions. Word has length 251 [2022-01-31 17:52:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:10,308 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 262 transitions. [2022-01-31 17:52:10,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0504201680672267) internal successors, (244), 118 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:10,308 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 262 transitions. [2022-01-31 17:52:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-31 17:52:10,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:10,309 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:10,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:52:10,309 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:10,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1730366382, now seen corresponding path program 116 times [2022-01-31 17:52:10,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:10,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136621229] [2022-01-31 17:52:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:10,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:10,310 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:10,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:10,317 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:14,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:14,669 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:14,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136621229] [2022-01-31 17:52:14,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1136621229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:14,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:14,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:52:14,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832504511] [2022-01-31 17:52:14,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:14,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:52:14,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:52:14,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:52:14,671 INFO L87 Difference]: Start difference. First operand 258 states and 262 transitions. Second operand has 120 states, 120 states have (on average 2.05) internal successors, (246), 119 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:19,929 INFO L93 Difference]: Finished difference Result 280 states and 288 transitions. [2022-01-31 17:52:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:52:19,929 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.05) internal successors, (246), 119 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-01-31 17:52:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:19,929 INFO L225 Difference]: With dead ends: 280 [2022-01-31 17:52:19,930 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 17:52:19,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:52:19,932 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 253 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:19,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 60 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:52:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 17:52:20,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2022-01-31 17:52:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.0196850393700787) internal successors, (259), 254 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 17:52:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 264 transitions. [2022-01-31 17:52:20,030 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 264 transitions. Word has length 253 [2022-01-31 17:52:20,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:20,030 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 264 transitions. [2022-01-31 17:52:20,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.05) internal successors, (246), 119 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:20,030 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 264 transitions. [2022-01-31 17:52:20,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:52:20,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:20,031 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:20,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:52:20,031 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1287663216, now seen corresponding path program 117 times [2022-01-31 17:52:20,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:20,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991179707] [2022-01-31 17:52:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:20,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:20,033 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:20,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:20,042 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:24,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:24,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:24,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991179707] [2022-01-31 17:52:24,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991179707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:24,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:24,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:52:24,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908054427] [2022-01-31 17:52:24,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:24,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:52:24,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:24,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:52:24,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:52:24,454 INFO L87 Difference]: Start difference. First operand 260 states and 264 transitions. Second operand has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 120 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:29,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:29,781 INFO L93 Difference]: Finished difference Result 282 states and 290 transitions. [2022-01-31 17:52:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:52:29,781 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 120 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 17:52:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:29,782 INFO L225 Difference]: With dead ends: 282 [2022-01-31 17:52:29,782 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 17:52:29,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:52:29,784 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 255 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:29,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 60 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:52:29,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 17:52:29,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2022-01-31 17:52:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 256 states have (on average 1.01953125) internal successors, (261), 256 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 266 transitions. [2022-01-31 17:52:29,884 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 266 transitions. Word has length 255 [2022-01-31 17:52:29,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:29,884 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 266 transitions. [2022-01-31 17:52:29,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 120 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:29,884 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 266 transitions. [2022-01-31 17:52:29,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 17:52:29,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:29,885 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:29,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:52:29,885 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:29,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:29,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1783785202, now seen corresponding path program 118 times [2022-01-31 17:52:29,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:29,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814511348] [2022-01-31 17:52:29,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:29,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:29,887 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:29,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:29,894 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:34,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:34,400 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:34,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814511348] [2022-01-31 17:52:34,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [814511348] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:34,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:34,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:52:34,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316066571] [2022-01-31 17:52:34,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:34,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:52:34,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:34,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:52:34,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:52:34,403 INFO L87 Difference]: Start difference. First operand 262 states and 266 transitions. Second operand has 122 states, 122 states have (on average 2.0491803278688523) internal successors, (250), 121 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:39,775 INFO L93 Difference]: Finished difference Result 284 states and 292 transitions. [2022-01-31 17:52:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:52:39,775 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0491803278688523) internal successors, (250), 121 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-01-31 17:52:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:39,776 INFO L225 Difference]: With dead ends: 284 [2022-01-31 17:52:39,776 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 17:52:39,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:52:39,778 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 257 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:39,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 50 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:52:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 17:52:39,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2022-01-31 17:52:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 258 states have (on average 1.0193798449612403) internal successors, (263), 258 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 268 transitions. [2022-01-31 17:52:39,873 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 268 transitions. Word has length 257 [2022-01-31 17:52:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:39,874 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 268 transitions. [2022-01-31 17:52:39,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0491803278688523) internal successors, (250), 121 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 268 transitions. [2022-01-31 17:52:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:52:39,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:39,875 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:39,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:52:39,875 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1491784748, now seen corresponding path program 119 times [2022-01-31 17:52:39,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:39,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469332262] [2022-01-31 17:52:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:39,877 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:39,877 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:39,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:39,884 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:44,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:44,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:44,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469332262] [2022-01-31 17:52:44,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1469332262] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:44,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:44,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:52:44,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316472072] [2022-01-31 17:52:44,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:44,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:52:44,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:44,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:52:44,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:52:44,473 INFO L87 Difference]: Start difference. First operand 264 states and 268 transitions. Second operand has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:49,968 INFO L93 Difference]: Finished difference Result 286 states and 294 transitions. [2022-01-31 17:52:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:52:49,969 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-01-31 17:52:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:49,969 INFO L225 Difference]: With dead ends: 286 [2022-01-31 17:52:49,969 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 17:52:49,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:52:49,972 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 259 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:49,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 50 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:52:49,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 17:52:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2022-01-31 17:52:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 260 states have (on average 1.0192307692307692) internal successors, (265), 260 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 270 transitions. [2022-01-31 17:52:50,071 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 270 transitions. Word has length 259 [2022-01-31 17:52:50,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:50,071 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 270 transitions. [2022-01-31 17:52:50,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:50,072 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 270 transitions. [2022-01-31 17:52:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 17:52:50,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:50,072 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:50,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:52:50,073 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:50,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1103478730, now seen corresponding path program 120 times [2022-01-31 17:52:50,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:50,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111645510] [2022-01-31 17:52:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:50,074 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:50,074 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:50,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:50,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:54,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:54,731 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:54,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111645510] [2022-01-31 17:52:54,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [111645510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:54,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:54,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:52:54,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043185959] [2022-01-31 17:52:54,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:54,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:52:54,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:54,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:52:54,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:52:54,734 INFO L87 Difference]: Start difference. First operand 266 states and 270 transitions. Second operand has 124 states, 124 states have (on average 2.0483870967741935) internal successors, (254), 123 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:00,287 INFO L93 Difference]: Finished difference Result 288 states and 296 transitions. [2022-01-31 17:53:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:53:00,288 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0483870967741935) internal successors, (254), 123 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2022-01-31 17:53:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:00,288 INFO L225 Difference]: With dead ends: 288 [2022-01-31 17:53:00,288 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 17:53:00,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:53:00,291 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 261 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:00,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 55 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:53:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 17:53:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2022-01-31 17:53:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.0190839694656488) internal successors, (267), 262 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 17:53:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 272 transitions. [2022-01-31 17:53:00,389 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 272 transitions. Word has length 261 [2022-01-31 17:53:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:00,389 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 272 transitions. [2022-01-31 17:53:00,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0483870967741935) internal successors, (254), 123 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 272 transitions. [2022-01-31 17:53:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 17:53:00,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:00,390 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:00,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:53:00,390 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:00,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1603550184, now seen corresponding path program 121 times [2022-01-31 17:53:00,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:00,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338795572] [2022-01-31 17:53:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:00,391 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:00,391 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:00,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:00,399 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:05,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:05,123 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338795572] [2022-01-31 17:53:05,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [338795572] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:05,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:05,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:53:05,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210468285] [2022-01-31 17:53:05,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:05,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:53:05,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:05,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:53:05,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:53:05,126 INFO L87 Difference]: Start difference. First operand 268 states and 272 transitions. Second operand has 125 states, 125 states have (on average 2.048) internal successors, (256), 124 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:10,776 INFO L93 Difference]: Finished difference Result 290 states and 298 transitions. [2022-01-31 17:53:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:53:10,776 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.048) internal successors, (256), 124 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 17:53:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:10,777 INFO L225 Difference]: With dead ends: 290 [2022-01-31 17:53:10,777 INFO L226 Difference]: Without dead ends: 271 [2022-01-31 17:53:10,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:53:10,779 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 263 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:10,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 45 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:53:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-31 17:53:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2022-01-31 17:53:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 264 states have (on average 1.018939393939394) internal successors, (269), 264 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 274 transitions. [2022-01-31 17:53:10,880 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 274 transitions. Word has length 263 [2022-01-31 17:53:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:10,880 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 274 transitions. [2022-01-31 17:53:10,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.048) internal successors, (256), 124 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 274 transitions. [2022-01-31 17:53:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 17:53:10,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:10,881 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:10,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:53:10,881 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:10,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1135880326, now seen corresponding path program 122 times [2022-01-31 17:53:10,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:10,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004187476] [2022-01-31 17:53:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:10,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:10,883 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:10,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:10,891 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:15,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:15,815 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:15,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004187476] [2022-01-31 17:53:15,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004187476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:15,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:15,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:53:15,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801267306] [2022-01-31 17:53:15,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:15,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:53:15,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:15,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:53:15,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:53:15,818 INFO L87 Difference]: Start difference. First operand 270 states and 274 transitions. Second operand has 126 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 125 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:21,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:21,586 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2022-01-31 17:53:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:53:21,587 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 125 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-01-31 17:53:21,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:21,587 INFO L225 Difference]: With dead ends: 292 [2022-01-31 17:53:21,587 INFO L226 Difference]: Without dead ends: 273 [2022-01-31 17:53:21,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:53:21,591 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 265 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:21,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 55 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:53:21,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-31 17:53:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2022-01-31 17:53:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.018796992481203) internal successors, (271), 266 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 276 transitions. [2022-01-31 17:53:21,688 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 276 transitions. Word has length 265 [2022-01-31 17:53:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:21,689 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 276 transitions. [2022-01-31 17:53:21,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 125 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 276 transitions. [2022-01-31 17:53:21,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:53:21,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:21,690 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:21,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:53:21,690 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:21,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:21,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1618254428, now seen corresponding path program 123 times [2022-01-31 17:53:21,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:21,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305945497] [2022-01-31 17:53:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:21,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:21,691 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:21,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:21,699 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:26,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:26,566 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:26,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305945497] [2022-01-31 17:53:26,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305945497] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:26,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:26,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:53:26,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605917415] [2022-01-31 17:53:26,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:26,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:53:26,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:26,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:53:26,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:53:26,568 INFO L87 Difference]: Start difference. First operand 272 states and 276 transitions. Second operand has 127 states, 127 states have (on average 2.047244094488189) internal successors, (260), 126 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:32,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:32,463 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2022-01-31 17:53:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:53:32,464 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.047244094488189) internal successors, (260), 126 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 17:53:32,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:32,464 INFO L225 Difference]: With dead ends: 294 [2022-01-31 17:53:32,465 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 17:53:32,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:53:32,467 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 267 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:32,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 70 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:53:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 17:53:32,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2022-01-31 17:53:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 268 states have (on average 1.0186567164179106) internal successors, (273), 268 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 278 transitions. [2022-01-31 17:53:32,576 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 278 transitions. Word has length 267 [2022-01-31 17:53:32,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:32,577 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 278 transitions. [2022-01-31 17:53:32,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.047244094488189) internal successors, (260), 126 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 278 transitions. [2022-01-31 17:53:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-31 17:53:32,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:32,578 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:32,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:53:32,578 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:32,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:32,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1653068610, now seen corresponding path program 124 times [2022-01-31 17:53:32,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:32,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340481778] [2022-01-31 17:53:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:32,580 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:32,580 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:32,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:32,589 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:37,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:37,534 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 17:53:37,534 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340481778] [2022-01-31 17:53:37,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [340481778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:37,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:37,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:53:37,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357578938] [2022-01-31 17:53:37,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:37,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:53:37,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:53:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:53:37,538 INFO L87 Difference]: Start difference. First operand 274 states and 278 transitions. Second operand has 128 states, 128 states have (on average 2.046875) internal successors, (262), 127 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:43,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:43,537 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2022-01-31 17:53:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:53:43,537 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.046875) internal successors, (262), 127 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-01-31 17:53:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:43,538 INFO L225 Difference]: With dead ends: 296 [2022-01-31 17:53:43,538 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 17:53:43,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:53:43,540 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 269 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:43,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 75 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:53:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 17:53:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2022-01-31 17:53:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 270 states have (on average 1.0185185185185186) internal successors, (275), 270 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 17:53:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-01-31 17:53:43,637 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 269 [2022-01-31 17:53:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:43,637 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-01-31 17:53:43,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.046875) internal successors, (262), 127 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:43,637 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-01-31 17:53:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 17:53:43,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:43,638 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:43,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:53:43,638 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:43,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1478447456, now seen corresponding path program 125 times [2022-01-31 17:53:43,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:43,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825458136] [2022-01-31 17:53:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:43,640 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:43,640 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:43,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:43,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:48,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:48,669 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:48,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825458136] [2022-01-31 17:53:48,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [825458136] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:48,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:48,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:53:48,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100292999] [2022-01-31 17:53:48,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:48,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:53:48,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:48,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:53:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:53:48,673 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 129 states, 129 states have (on average 2.046511627906977) internal successors, (264), 128 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:54,706 INFO L93 Difference]: Finished difference Result 298 states and 306 transitions. [2022-01-31 17:53:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:53:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.046511627906977) internal successors, (264), 128 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 17:53:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:54,707 INFO L225 Difference]: With dead ends: 298 [2022-01-31 17:53:54,708 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 17:53:54,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:53:54,710 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 271 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:54,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 65 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:53:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 17:53:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2022-01-31 17:53:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 272 states have (on average 1.0183823529411764) internal successors, (277), 272 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 282 transitions. [2022-01-31 17:53:54,804 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 282 transitions. Word has length 271 [2022-01-31 17:53:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:54,805 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 282 transitions. [2022-01-31 17:53:54,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.046511627906977) internal successors, (264), 128 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:54,805 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 282 transitions. [2022-01-31 17:53:54,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 17:53:54,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:54,806 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:54,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:53:54,806 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:54,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1171243006, now seen corresponding path program 126 times [2022-01-31 17:53:54,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:54,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064641915] [2022-01-31 17:53:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:54,807 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:54,807 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:54,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:54,816 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:59,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:59,881 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:59,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064641915] [2022-01-31 17:53:59,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1064641915] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:59,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:59,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:53:59,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523766964] [2022-01-31 17:53:59,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:59,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:53:59,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:59,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:53:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:53:59,884 INFO L87 Difference]: Start difference. First operand 278 states and 282 transitions. Second operand has 130 states, 130 states have (on average 2.046153846153846) internal successors, (266), 129 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:06,058 INFO L93 Difference]: Finished difference Result 300 states and 308 transitions. [2022-01-31 17:54:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:54:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.046153846153846) internal successors, (266), 129 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2022-01-31 17:54:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:06,059 INFO L225 Difference]: With dead ends: 300 [2022-01-31 17:54:06,059 INFO L226 Difference]: Without dead ends: 281 [2022-01-31 17:54:06,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:54:06,061 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 273 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:06,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 70 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:54:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-31 17:54:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2022-01-31 17:54:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.0182481751824817) internal successors, (279), 274 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 284 transitions. [2022-01-31 17:54:06,156 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 284 transitions. Word has length 273 [2022-01-31 17:54:06,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:06,156 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 284 transitions. [2022-01-31 17:54:06,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.046153846153846) internal successors, (266), 129 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:06,157 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 284 transitions. [2022-01-31 17:54:06,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:54:06,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:06,157 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:06,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:54:06,157 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:06,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1994457316, now seen corresponding path program 127 times [2022-01-31 17:54:06,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:06,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022731835] [2022-01-31 17:54:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:06,159 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:06,159 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:06,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:06,168 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:11,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:11,313 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:11,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022731835] [2022-01-31 17:54:11,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2022731835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:11,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:11,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:54:11,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412876638] [2022-01-31 17:54:11,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:11,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:54:11,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:11,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:54:11,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:54:11,316 INFO L87 Difference]: Start difference. First operand 280 states and 284 transitions. Second operand has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 130 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:17,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:17,548 INFO L93 Difference]: Finished difference Result 302 states and 310 transitions. [2022-01-31 17:54:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:54:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 130 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have 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 17:54:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:17,549 INFO L225 Difference]: With dead ends: 302 [2022-01-31 17:54:17,549 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 17:54:17,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:54:17,552 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 275 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:17,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 75 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:54:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 17:54:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 282. [2022-01-31 17:54:17,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 276 states have (on average 1.0181159420289856) internal successors, (281), 276 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 286 transitions. [2022-01-31 17:54:17,668 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 286 transitions. Word has length 275 [2022-01-31 17:54:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:17,669 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 286 transitions. [2022-01-31 17:54:17,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 130 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 286 transitions. [2022-01-31 17:54:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 17:54:17,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:17,669 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:17,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:54:17,670 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:17,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash 899346106, now seen corresponding path program 128 times [2022-01-31 17:54:17,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:17,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766736423] [2022-01-31 17:54:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:17,671 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:17,671 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:17,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:17,679 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:22,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:22,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:22,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766736423] [2022-01-31 17:54:22,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [766736423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:22,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:22,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:54:22,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573184751] [2022-01-31 17:54:22,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:22,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:54:22,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:54:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:54:22,912 INFO L87 Difference]: Start difference. First operand 282 states and 286 transitions. Second operand has 132 states, 132 states have (on average 2.0454545454545454) internal successors, (270), 131 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:29,193 INFO L93 Difference]: Finished difference Result 304 states and 312 transitions. [2022-01-31 17:54:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:54:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0454545454545454) internal successors, (270), 131 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-01-31 17:54:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:29,194 INFO L225 Difference]: With dead ends: 304 [2022-01-31 17:54:29,194 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 17:54:29,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:54:29,196 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 277 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:29,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 70 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:54:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 17:54:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2022-01-31 17:54:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.0179856115107915) internal successors, (283), 278 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 17:54:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 288 transitions. [2022-01-31 17:54:29,296 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 288 transitions. Word has length 277 [2022-01-31 17:54:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:29,296 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 288 transitions. [2022-01-31 17:54:29,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.0454545454545454) internal successors, (270), 131 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 288 transitions. [2022-01-31 17:54:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:54:29,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:29,297 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:29,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:54:29,297 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1294373160, now seen corresponding path program 129 times [2022-01-31 17:54:29,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:29,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670148065] [2022-01-31 17:54:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:29,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:29,298 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:29,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:29,306 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:34,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:34,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:34,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670148065] [2022-01-31 17:54:34,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670148065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:34,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:34,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:54:34,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995529221] [2022-01-31 17:54:34,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:34,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:54:34,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:34,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:54:34,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:54:34,710 INFO L87 Difference]: Start difference. First operand 284 states and 288 transitions. Second operand has 133 states, 133 states have (on average 2.045112781954887) internal successors, (272), 132 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:41,081 INFO L93 Difference]: Finished difference Result 306 states and 314 transitions. [2022-01-31 17:54:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:54:41,082 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.045112781954887) internal successors, (272), 132 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-01-31 17:54:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:41,082 INFO L225 Difference]: With dead ends: 306 [2022-01-31 17:54:41,082 INFO L226 Difference]: Without dead ends: 287 [2022-01-31 17:54:41,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:54:41,085 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 279 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:41,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 55 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:54:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-31 17:54:41,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2022-01-31 17:54:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.0178571428571428) internal successors, (285), 280 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:41,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 290 transitions. [2022-01-31 17:54:41,203 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 290 transitions. Word has length 279 [2022-01-31 17:54:41,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:41,203 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 290 transitions. [2022-01-31 17:54:41,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.045112781954887) internal successors, (272), 132 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 290 transitions. [2022-01-31 17:54:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 17:54:41,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:41,204 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:41,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:54:41,204 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash -629645450, now seen corresponding path program 130 times [2022-01-31 17:54:41,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:41,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366989748] [2022-01-31 17:54:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:41,206 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:41,206 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:41,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:41,215 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:46,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:46,639 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:46,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366989748] [2022-01-31 17:54:46,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1366989748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:46,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:46,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:54:46,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118235550] [2022-01-31 17:54:46,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:46,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:54:46,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:46,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:54:46,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:54:46,642 INFO L87 Difference]: Start difference. First operand 286 states and 290 transitions. Second operand has 134 states, 134 states have (on average 2.044776119402985) internal successors, (274), 133 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:53,135 INFO L93 Difference]: Finished difference Result 308 states and 316 transitions. [2022-01-31 17:54:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:54:53,136 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.044776119402985) internal successors, (274), 133 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-01-31 17:54:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:53,136 INFO L225 Difference]: With dead ends: 308 [2022-01-31 17:54:53,136 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 17:54:53,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:54:53,139 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 281 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:53,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 50 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:54:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 17:54:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2022-01-31 17:54:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.0177304964539007) internal successors, (287), 282 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 292 transitions. [2022-01-31 17:54:53,259 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 292 transitions. Word has length 281 [2022-01-31 17:54:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:53,259 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 292 transitions. [2022-01-31 17:54:53,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.044776119402985) internal successors, (274), 133 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 292 transitions. [2022-01-31 17:54:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 17:54:53,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:53,260 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:53,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:54:53,260 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1776443244, now seen corresponding path program 131 times [2022-01-31 17:54:53,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:53,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917607359] [2022-01-31 17:54:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:53,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:53,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:53,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:53,271 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:58,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:58,725 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:58,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917607359] [2022-01-31 17:54:58,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1917607359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:58,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:58,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:54:58,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719814934] [2022-01-31 17:54:58,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:58,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:54:58,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:58,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:54:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:54:58,728 INFO L87 Difference]: Start difference. First operand 288 states and 292 transitions. Second operand has 135 states, 135 states have (on average 2.0444444444444443) internal successors, (276), 134 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:05,356 INFO L93 Difference]: Finished difference Result 310 states and 318 transitions. [2022-01-31 17:55:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:55:05,357 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0444444444444443) internal successors, (276), 134 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have 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 17:55:05,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:05,357 INFO L225 Difference]: With dead ends: 310 [2022-01-31 17:55:05,357 INFO L226 Difference]: Without dead ends: 291 [2022-01-31 17:55:05,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:55:05,360 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 283 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:05,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 70 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:55:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-01-31 17:55:05,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2022-01-31 17:55:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 284 states have (on average 1.017605633802817) internal successors, (289), 284 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:05,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 294 transitions. [2022-01-31 17:55:05,475 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 294 transitions. Word has length 283 [2022-01-31 17:55:05,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:05,475 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 294 transitions. [2022-01-31 17:55:05,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.0444444444444443) internal successors, (276), 134 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:05,475 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 294 transitions. [2022-01-31 17:55:05,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 17:55:05,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:05,476 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:05,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:55:05,476 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash -42528206, now seen corresponding path program 132 times [2022-01-31 17:55:05,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:05,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847595630] [2022-01-31 17:55:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:05,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:05,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:05,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:05,487 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:11,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:11,028 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:11,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847595630] [2022-01-31 17:55:11,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [847595630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:11,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:11,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:55:11,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926443967] [2022-01-31 17:55:11,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:11,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:55:11,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:55:11,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:55:11,031 INFO L87 Difference]: Start difference. First operand 290 states and 294 transitions. Second operand has 136 states, 136 states have (on average 2.0441176470588234) internal successors, (278), 135 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:17,719 INFO L93 Difference]: Finished difference Result 312 states and 320 transitions. [2022-01-31 17:55:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:55:17,719 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0441176470588234) internal successors, (278), 135 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-01-31 17:55:17,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:17,720 INFO L225 Difference]: With dead ends: 312 [2022-01-31 17:55:17,720 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 17:55:17,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:55:17,722 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 285 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:17,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 45 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:55:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 17:55:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2022-01-31 17:55:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.0174825174825175) internal successors, (291), 286 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 17:55:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 296 transitions. [2022-01-31 17:55:17,838 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 296 transitions. Word has length 285 [2022-01-31 17:55:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:17,839 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 296 transitions. [2022-01-31 17:55:17,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0441176470588234) internal successors, (278), 135 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 296 transitions. [2022-01-31 17:55:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 17:55:17,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:17,840 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:17,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:55:17,840 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:17,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:17,840 INFO L85 PathProgramCache]: Analyzing trace with hash -197487536, now seen corresponding path program 133 times [2022-01-31 17:55:17,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:17,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105217949] [2022-01-31 17:55:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:17,842 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:17,842 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:17,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:17,850 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:23,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:23,476 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:23,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105217949] [2022-01-31 17:55:23,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2105217949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:23,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:23,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:55:23,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116600260] [2022-01-31 17:55:23,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:23,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:55:23,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:23,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:55:23,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:55:23,478 INFO L87 Difference]: Start difference. First operand 292 states and 296 transitions. Second operand has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 136 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:30,251 INFO L93 Difference]: Finished difference Result 314 states and 322 transitions. [2022-01-31 17:55:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:55:30,251 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 136 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 17:55:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:30,252 INFO L225 Difference]: With dead ends: 314 [2022-01-31 17:55:30,252 INFO L226 Difference]: Without dead ends: 295 [2022-01-31 17:55:30,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:55:30,254 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 287 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:30,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 60 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:55:30,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-31 17:55:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2022-01-31 17:55:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 288 states have (on average 1.0173611111111112) internal successors, (293), 288 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 298 transitions. [2022-01-31 17:55:30,370 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 298 transitions. Word has length 287 [2022-01-31 17:55:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:30,371 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 298 transitions. [2022-01-31 17:55:30,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 136 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 298 transitions. [2022-01-31 17:55:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-31 17:55:30,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:30,372 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:30,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 17:55:30,372 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:30,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1210451694, now seen corresponding path program 134 times [2022-01-31 17:55:30,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:30,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148632495] [2022-01-31 17:55:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:30,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:30,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:30,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:30,382 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:36,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:36,142 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:36,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148632495] [2022-01-31 17:55:36,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [148632495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:36,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:36,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:55:36,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334655929] [2022-01-31 17:55:36,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:36,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:55:36,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:36,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:55:36,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:55:36,145 INFO L87 Difference]: Start difference. First operand 294 states and 298 transitions. Second operand has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:43,048 INFO L93 Difference]: Finished difference Result 316 states and 324 transitions. [2022-01-31 17:55:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:55:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2022-01-31 17:55:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:43,049 INFO L225 Difference]: With dead ends: 316 [2022-01-31 17:55:43,049 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 17:55:43,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:55:43,052 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 289 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:43,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 60 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:55:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 17:55:43,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2022-01-31 17:55:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.0172413793103448) internal successors, (295), 290 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 300 transitions. [2022-01-31 17:55:43,170 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 300 transitions. Word has length 289 [2022-01-31 17:55:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:43,170 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 300 transitions. [2022-01-31 17:55:43,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:43,170 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 300 transitions. [2022-01-31 17:55:43,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:55:43,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:43,171 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:43,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 17:55:43,171 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:43,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:43,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1325353484, now seen corresponding path program 135 times [2022-01-31 17:55:43,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:43,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098504782] [2022-01-31 17:55:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:43,173 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:43,173 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:43,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:43,182 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:48,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:48,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:48,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098504782] [2022-01-31 17:55:48,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1098504782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:48,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:48,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:55:48,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994629458] [2022-01-31 17:55:48,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:48,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:55:48,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:48,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:55:48,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:55:48,985 INFO L87 Difference]: Start difference. First operand 296 states and 300 transitions. Second operand has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 138 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:55,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:55,963 INFO L93 Difference]: Finished difference Result 318 states and 326 transitions. [2022-01-31 17:55:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 17:55:55,964 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 138 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have 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 17:55:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:55,964 INFO L225 Difference]: With dead ends: 318 [2022-01-31 17:55:55,964 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 17:55:55,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 17:55:55,967 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 291 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:55,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 40 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:55:55,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 17:55:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2022-01-31 17:55:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 292 states have (on average 1.0171232876712328) internal successors, (297), 292 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 302 transitions. [2022-01-31 17:55:56,076 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 302 transitions. Word has length 291 [2022-01-31 17:55:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:56,076 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 302 transitions. [2022-01-31 17:55:56,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 138 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:56,076 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 302 transitions. [2022-01-31 17:55:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-31 17:55:56,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:56,077 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:56,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 17:55:56,077 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:56,077 INFO L85 PathProgramCache]: Analyzing trace with hash 76823978, now seen corresponding path program 136 times [2022-01-31 17:55:56,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:56,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809386927] [2022-01-31 17:55:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:56,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:56,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:56,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:56,088 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:02,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:02,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:02,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809386927] [2022-01-31 17:56:02,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [809386927] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:02,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:02,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 17:56:02,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703066668] [2022-01-31 17:56:02,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:02,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 17:56:02,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 17:56:02,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:56:02,031 INFO L87 Difference]: Start difference. First operand 298 states and 302 transitions. Second operand has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:09,079 INFO L93 Difference]: Finished difference Result 320 states and 328 transitions. [2022-01-31 17:56:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 17:56:09,080 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 293 [2022-01-31 17:56:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:09,080 INFO L225 Difference]: With dead ends: 320 [2022-01-31 17:56:09,080 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 17:56:09,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 17:56:09,083 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 293 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:09,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 35 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:56:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 17:56:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 300. [2022-01-31 17:56:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.0170068027210883) internal successors, (299), 294 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 17:56:09,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 304 transitions. [2022-01-31 17:56:09,193 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 304 transitions. Word has length 293 [2022-01-31 17:56:09,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:09,193 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 304 transitions. [2022-01-31 17:56:09,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:09,193 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 304 transitions. [2022-01-31 17:56:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 17:56:09,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:09,194 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:09,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 17:56:09,194 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:09,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:09,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1464155704, now seen corresponding path program 137 times [2022-01-31 17:56:09,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:09,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155333575] [2022-01-31 17:56:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:09,196 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:09,196 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:09,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:09,205 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:15,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:15,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:15,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155333575] [2022-01-31 17:56:15,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155333575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:15,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:15,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 17:56:15,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481809930] [2022-01-31 17:56:15,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:15,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 17:56:15,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:15,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 17:56:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:56:15,172 INFO L87 Difference]: Start difference. First operand 300 states and 304 transitions. Second operand has 141 states, 141 states have (on average 2.0425531914893615) internal successors, (288), 140 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)