/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-industry-pattern/array_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 18:12:31,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 18:12:31,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 18:12:31,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 18:12:31,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 18:12:31,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 18:12:31,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 18:12:31,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 18:12:31,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 18:12:31,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 18:12:31,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 18:12:31,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 18:12:31,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 18:12:31,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 18:12:31,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 18:12:31,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 18:12:31,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 18:12:31,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 18:12:31,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 18:12:31,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 18:12:31,175 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 18:12:31,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 18:12:31,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 18:12:31,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 18:12:31,186 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 18:12:31,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 18:12:31,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 18:12:31,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 18:12:31,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 18:12:31,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 18:12:31,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 18:12:31,188 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 18:12:31,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 18:12:31,188 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 18:12:31,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 18:12:31,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 18:12:31,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 18:12:31,188 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 18:12:31,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 18:12:31,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:12:31,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 18:12:31,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 18:12:31,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 18:12:31,189 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 18:12:31,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 18:12:31,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 18:12:31,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 18:12:31,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 18:12:31,406 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 18:12:31,407 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 18:12:31,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2022-01-31 18:12:31,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230414064/84513e57eaa44d819515ce9f51af36fe/FLAG59688d928 [2022-01-31 18:12:31,825 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 18:12:31,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2022-01-31 18:12:31,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230414064/84513e57eaa44d819515ce9f51af36fe/FLAG59688d928 [2022-01-31 18:12:31,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230414064/84513e57eaa44d819515ce9f51af36fe [2022-01-31 18:12:31,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 18:12:31,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 18:12:31,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 18:12:31,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 18:12:31,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 18:12:31,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:12:31" (1/1) ... [2022-01-31 18:12:31,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29082b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:31, skipping insertion in model container [2022-01-31 18:12:31,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:12:31" (1/1) ... [2022-01-31 18:12:31,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 18:12:31,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 18:12:32,065 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-industry-pattern/array_monotonic.i[808,821] [2022-01-31 18:12:32,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:12:32,083 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 18:12:32,092 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-industry-pattern/array_monotonic.i[808,821] [2022-01-31 18:12:32,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:12:32,108 INFO L208 MainTranslator]: Completed translation [2022-01-31 18:12:32,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:32 WrapperNode [2022-01-31 18:12:32,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 18:12:32,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 18:12:32,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 18:12:32,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 18:12:32,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:32" (1/1) ... [2022-01-31 18:12:32,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:32" (1/1) ... [2022-01-31 18:12:32,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:32" (1/1) ... [2022-01-31 18:12:32,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:32" (1/1) ... [2022-01-31 18:12:32,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:32" (1/1) ... [2022-01-31 18:12:32,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:32" (1/1) ... [2022-01-31 18:12:32,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:32" (1/1) ... [2022-01-31 18:12:32,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 18:12:32,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 18:12:32,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 18:12:32,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 18:12:32,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:32" (1/1) ... [2022-01-31 18:12:32,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:12:32,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 18:12:32,168 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 18:12:32,220 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 18:12:32,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 18:12:32,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 18:12:32,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 18:12:32,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 18:12:32,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 18:12:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 18:12:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 18:12:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 18:12:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 18:12:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 18:12:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 18:12:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 18:12:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 18:12:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 18:12:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 18:12:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 18:12:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 18:12:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 18:12:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 18:12:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 18:12:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 18:12:32,325 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 18:12:32,326 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 18:12:32,430 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 18:12:32,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 18:12:32,434 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 18:12:32,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:12:32 BoogieIcfgContainer [2022-01-31 18:12:32,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 18:12:32,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 18:12:32,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 18:12:32,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 18:12:32,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:12:31" (1/3) ... [2022-01-31 18:12:32,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d98e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:12:32, skipping insertion in model container [2022-01-31 18:12:32,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:32" (2/3) ... [2022-01-31 18:12:32,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d98e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:12:32, skipping insertion in model container [2022-01-31 18:12:32,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:12:32" (3/3) ... [2022-01-31 18:12:32,444 INFO L111 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2022-01-31 18:12:32,447 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 18:12:32,447 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 18:12:32,481 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 18:12:32,488 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 18:12:32,488 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 18:12:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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 18:12:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 18:12:32,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:32,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:32,508 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:32,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1774353919, now seen corresponding path program 1 times [2022-01-31 18:12:32,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:32,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761000107] [2022-01-31 18:12:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:32,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:32,565 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:32,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:32,694 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:32,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761000107] [2022-01-31 18:12:32,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1761000107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:32,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:32,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 18:12:32,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955346765] [2022-01-31 18:12:32,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:32,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 18:12:32,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:32,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 18:12:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:12:32,723 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:32,765 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-01-31 18:12:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 18:12:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 18:12:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:32,771 INFO L225 Difference]: With dead ends: 43 [2022-01-31 18:12:32,771 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 18:12:32,773 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 18:12:32,776 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 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 18:12:32,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:12:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 18:12:32,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-31 18:12:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-01-31 18:12:32,807 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2022-01-31 18:12:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:32,807 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-01-31 18:12:32,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:32,808 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-01-31 18:12:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 18:12:32,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:32,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:32,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 18:12:32,809 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:32,810 INFO L85 PathProgramCache]: Analyzing trace with hash -216690582, now seen corresponding path program 1 times [2022-01-31 18:12:32,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:32,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067044747] [2022-01-31 18:12:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:32,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:32,815 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:32,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:32,895 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:32,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067044747] [2022-01-31 18:12:32,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067044747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:32,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:32,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:12:32,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806481507] [2022-01-31 18:12:32,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:32,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 18:12:32,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:32,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 18:12:32,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 18:12:32,898 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:32,957 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-31 18:12:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 18:12:32,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 18:12:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:32,960 INFO L225 Difference]: With dead ends: 41 [2022-01-31 18:12:32,960 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 18:12:32,963 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 18:12:32,964 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:32,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:12:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 18:12:32,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2022-01-31 18:12:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-31 18:12:32,977 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-01-31 18:12:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:32,978 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-31 18:12:32,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-31 18:12:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 18:12:32,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:32,979 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 18:12:32,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 18:12:32,980 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:32,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:32,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1621961321, now seen corresponding path program 1 times [2022-01-31 18:12:32,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:32,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207271689] [2022-01-31 18:12:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:33,003 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:33,004 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:33,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:33,006 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:33,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:33,081 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:33,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207271689] [2022-01-31 18:12:33,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [207271689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:33,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:33,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:12:33,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9363083] [2022-01-31 18:12:33,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:33,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:12:33,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:33,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:12:33,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:12:33,083 INFO L87 Difference]: Start difference. First operand 22 states and 25 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 18:12:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:33,161 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2022-01-31 18:12:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:12:33,162 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 18:12:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:33,162 INFO L225 Difference]: With dead ends: 49 [2022-01-31 18:12:33,162 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 18:12:33,163 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 18:12:33,163 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:33,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 29 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:12:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 18:12:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2022-01-31 18:12:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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 18:12:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-01-31 18:12:33,169 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2022-01-31 18:12:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:33,170 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-01-31 18:12:33,170 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 18:12:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-01-31 18:12:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 18:12:33,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:33,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:33,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 18:12:33,171 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1298654538, now seen corresponding path program 2 times [2022-01-31 18:12:33,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:33,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263883224] [2022-01-31 18:12:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:33,175 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:33,175 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:33,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:33,176 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:33,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:33,227 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:33,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263883224] [2022-01-31 18:12:33,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263883224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:33,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:33,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:12:33,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246277094] [2022-01-31 18:12:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:33,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:12:33,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:12:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:12:33,228 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 18:12:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:33,332 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-01-31 18:12:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:12:33,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 20 [2022-01-31 18:12:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:33,333 INFO L225 Difference]: With dead ends: 57 [2022-01-31 18:12:33,333 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 18:12:33,334 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 18:12:33,334 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:33,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 34 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 18:12:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2022-01-31 18:12:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-31 18:12:33,341 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2022-01-31 18:12:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:33,341 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-31 18:12:33,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 18:12:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-31 18:12:33,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 18:12:33,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:33,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:33,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 18:12:33,342 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:33,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:33,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1918227639, now seen corresponding path program 3 times [2022-01-31 18:12:33,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:33,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965395433] [2022-01-31 18:12:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:33,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:33,347 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:33,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:33,348 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:33,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:33,398 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:33,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965395433] [2022-01-31 18:12:33,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [965395433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:33,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:33,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:12:33,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890071274] [2022-01-31 18:12:33,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:33,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:12:33,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:33,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:12:33,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:12:33,400 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:33,505 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-01-31 18:12:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:12:33,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 18:12:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:33,506 INFO L225 Difference]: With dead ends: 65 [2022-01-31 18:12:33,506 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 18:12:33,507 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 18:12:33,507 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:33,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 34 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 18:12:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2022-01-31 18:12:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-01-31 18:12:33,514 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2022-01-31 18:12:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:33,514 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-01-31 18:12:33,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-01-31 18:12:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 18:12:33,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:33,515 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:33,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 18:12:33,515 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:33,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:33,515 INFO L85 PathProgramCache]: Analyzing trace with hash -148958678, now seen corresponding path program 4 times [2022-01-31 18:12:33,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:33,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730506053] [2022-01-31 18:12:33,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:33,519 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:33,519 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:33,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:33,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:33,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:33,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:33,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730506053] [2022-01-31 18:12:33,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1730506053] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:33,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:33,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:12:33,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646547659] [2022-01-31 18:12:33,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:33,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:12:33,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:33,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:12:33,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:12:33,579 INFO L87 Difference]: Start difference. First operand 31 states and 37 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 18:12:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:33,702 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2022-01-31 18:12:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:12:33,702 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 26 [2022-01-31 18:12:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:33,703 INFO L225 Difference]: With dead ends: 73 [2022-01-31 18:12:33,703 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 18:12:33,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:12:33,704 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:33,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 29 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 18:12:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2022-01-31 18:12:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-31 18:12:33,711 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 26 [2022-01-31 18:12:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:33,712 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-31 18:12:33,712 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 18:12:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-31 18:12:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 18:12:33,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:33,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:33,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 18:12:33,713 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:33,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1839528919, now seen corresponding path program 5 times [2022-01-31 18:12:33,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:33,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150543409] [2022-01-31 18:12:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:33,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:33,716 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:33,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:33,717 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:33,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:33,783 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:33,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150543409] [2022-01-31 18:12:33,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [150543409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:33,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:33,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 18:12:33,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330112481] [2022-01-31 18:12:33,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:33,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 18:12:33,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 18:12:33,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:12:33,784 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:33,928 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2022-01-31 18:12:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 18:12:33,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 18:12:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:33,930 INFO L225 Difference]: With dead ends: 81 [2022-01-31 18:12:33,930 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 18:12:33,930 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 18:12:33,931 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 131 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:33,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 29 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 18:12:33,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2022-01-31 18:12:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-01-31 18:12:33,938 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2022-01-31 18:12:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:33,938 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-01-31 18:12:33,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-01-31 18:12:33,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 18:12:33,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:33,939 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:33,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 18:12:33,939 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:33,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash 389617418, now seen corresponding path program 6 times [2022-01-31 18:12:33,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:33,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228282835] [2022-01-31 18:12:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:33,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:33,942 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:33,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:33,943 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:34,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228282835] [2022-01-31 18:12:34,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [228282835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:34,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:34,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 18:12:34,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097307728] [2022-01-31 18:12:34,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:34,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 18:12:34,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:34,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 18:12:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:12:34,011 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:34,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:34,179 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2022-01-31 18:12:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 18:12:34,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 18:12:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:34,180 INFO L225 Difference]: With dead ends: 89 [2022-01-31 18:12:34,180 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 18:12:34,181 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 18:12:34,181 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:34,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 34 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 18:12:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2022-01-31 18:12:34,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-01-31 18:12:34,189 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 32 [2022-01-31 18:12:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:34,189 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-01-31 18:12:34,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-01-31 18:12:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 18:12:34,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:34,190 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:34,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 18:12:34,190 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:34,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:34,190 INFO L85 PathProgramCache]: Analyzing trace with hash 562186999, now seen corresponding path program 7 times [2022-01-31 18:12:34,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:34,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270335496] [2022-01-31 18:12:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:34,193 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:34,194 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:34,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:34,195 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:34,266 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:34,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270335496] [2022-01-31 18:12:34,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [270335496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:34,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:34,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 18:12:34,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126036854] [2022-01-31 18:12:34,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:34,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 18:12:34,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:34,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 18:12:34,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:12:34,268 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:34,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:34,453 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2022-01-31 18:12:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 18:12:34,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 18:12:34,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:34,454 INFO L225 Difference]: With dead ends: 97 [2022-01-31 18:12:34,454 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 18:12:34,455 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 18:12:34,455 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 161 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:34,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 29 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 18:12:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 43. [2022-01-31 18:12:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-01-31 18:12:34,463 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 35 [2022-01-31 18:12:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:34,463 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-01-31 18:12:34,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-01-31 18:12:34,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 18:12:34,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:34,464 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:34,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 18:12:34,464 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:34,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:34,465 INFO L85 PathProgramCache]: Analyzing trace with hash 506721258, now seen corresponding path program 8 times [2022-01-31 18:12:34,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:34,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608789059] [2022-01-31 18:12:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:34,467 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:34,467 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:34,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:34,468 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:34,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608789059] [2022-01-31 18:12:34,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608789059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:34,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:34,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 18:12:34,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391836167] [2022-01-31 18:12:34,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:34,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 18:12:34,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:34,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 18:12:34,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:12:34,550 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 18:12:34,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:34,776 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2022-01-31 18:12:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 18:12:34,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 38 [2022-01-31 18:12:34,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:34,777 INFO L225 Difference]: With dead ends: 105 [2022-01-31 18:12:34,777 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 18:12:34,778 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 18:12:34,778 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 190 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:34,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 34 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 18:12:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2022-01-31 18:12:34,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-01-31 18:12:34,786 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 38 [2022-01-31 18:12:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:34,786 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-01-31 18:12:34,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 18:12:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-01-31 18:12:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 18:12:34,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:34,787 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:34,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 18:12:34,787 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:34,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:34,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1689240087, now seen corresponding path program 9 times [2022-01-31 18:12:34,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:34,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922662709] [2022-01-31 18:12:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:34,790 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:34,790 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:34,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:34,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:34,878 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922662709] [2022-01-31 18:12:34,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1922662709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:34,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:34,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 18:12:34,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804264191] [2022-01-31 18:12:34,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:34,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 18:12:34,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:34,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 18:12:34,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:12:34,896 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:35,163 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2022-01-31 18:12:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 18:12:35,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 18:12:35,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:35,164 INFO L225 Difference]: With dead ends: 113 [2022-01-31 18:12:35,164 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 18:12:35,164 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 18:12:35,165 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 209 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:35,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 29 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:35,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 18:12:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 49. [2022-01-31 18:12:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-01-31 18:12:35,172 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 41 [2022-01-31 18:12:35,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:35,172 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-01-31 18:12:35,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-01-31 18:12:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 18:12:35,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:35,173 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:35,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 18:12:35,173 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:35,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1509054262, now seen corresponding path program 10 times [2022-01-31 18:12:35,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:35,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884696707] [2022-01-31 18:12:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:35,175 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:35,175 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:35,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:35,176 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:35,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:35,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:35,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884696707] [2022-01-31 18:12:35,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [884696707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:35,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:35,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:12:35,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159418296] [2022-01-31 18:12:35,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:35,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:12:35,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:35,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:12:35,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:12:35,320 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:35,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:35,598 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2022-01-31 18:12:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:12:35,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 18:12:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:35,600 INFO L225 Difference]: With dead ends: 121 [2022-01-31 18:12:35,600 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 18:12:35,600 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 18:12:35,600 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:35,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 34 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 18:12:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 52. [2022-01-31 18:12:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-01-31 18:12:35,609 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 44 [2022-01-31 18:12:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:35,609 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-01-31 18:12:35,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-01-31 18:12:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 18:12:35,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:35,610 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:35,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 18:12:35,610 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:35,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:35,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1953456439, now seen corresponding path program 11 times [2022-01-31 18:12:35,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:35,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876388653] [2022-01-31 18:12:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:35,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:35,612 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:35,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:35,613 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:35,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:35,711 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:35,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876388653] [2022-01-31 18:12:35,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876388653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:35,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:35,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:12:35,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763604128] [2022-01-31 18:12:35,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:35,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:12:35,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:12:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:12:35,713 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:36,016 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2022-01-31 18:12:36,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:12:36,017 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 18:12:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:36,018 INFO L225 Difference]: With dead ends: 129 [2022-01-31 18:12:36,018 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 18:12:36,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:12:36,018 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 221 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:36,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 39 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 18:12:36,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2022-01-31 18:12:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-01-31 18:12:36,027 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 47 [2022-01-31 18:12:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:36,028 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-01-31 18:12:36,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-01-31 18:12:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 18:12:36,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:36,028 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:36,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 18:12:36,029 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1380201898, now seen corresponding path program 12 times [2022-01-31 18:12:36,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:36,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720745381] [2022-01-31 18:12:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:36,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:36,031 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:36,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:36,032 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:36,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:36,142 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 18:12:36,142 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:36,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720745381] [2022-01-31 18:12:36,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720745381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:36,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:36,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:12:36,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911526288] [2022-01-31 18:12:36,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:36,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:12:36,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:12:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:12:36,143 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 18:12:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:36,477 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2022-01-31 18:12:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:12:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 50 [2022-01-31 18:12:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:36,479 INFO L225 Difference]: With dead ends: 137 [2022-01-31 18:12:36,480 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 18:12:36,480 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 18:12:36,481 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 266 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:36,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 34 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 18:12:36,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 58. [2022-01-31 18:12:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2022-01-31 18:12:36,493 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 50 [2022-01-31 18:12:36,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:36,493 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2022-01-31 18:12:36,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 18:12:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2022-01-31 18:12:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 18:12:36,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:36,495 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:36,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 18:12:36,495 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:36,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:36,495 INFO L85 PathProgramCache]: Analyzing trace with hash 344139863, now seen corresponding path program 13 times [2022-01-31 18:12:36,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:36,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808960707] [2022-01-31 18:12:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:36,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:36,498 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:36,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:36,499 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:36,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:36,672 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:36,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808960707] [2022-01-31 18:12:36,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [808960707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:36,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:36,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 18:12:36,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377895865] [2022-01-31 18:12:36,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:36,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 18:12:36,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 18:12:36,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:12:36,673 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:37,122 INFO L93 Difference]: Finished difference Result 145 states and 192 transitions. [2022-01-31 18:12:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 18:12:37,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 18:12:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:37,123 INFO L225 Difference]: With dead ends: 145 [2022-01-31 18:12:37,123 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 18:12:37,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:12:37,124 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 280 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:37,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 34 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 18:12:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 61. [2022-01-31 18:12:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2022-01-31 18:12:37,136 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 53 [2022-01-31 18:12:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:37,137 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2022-01-31 18:12:37,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2022-01-31 18:12:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 18:12:37,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:37,138 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:37,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 18:12:37,138 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:37,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1344955766, now seen corresponding path program 14 times [2022-01-31 18:12:37,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:37,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340408755] [2022-01-31 18:12:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:37,141 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:37,141 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:37,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:37,142 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:37,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:37,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:37,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340408755] [2022-01-31 18:12:37,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340408755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:37,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:37,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:12:37,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38445826] [2022-01-31 18:12:37,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:37,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:12:37,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:37,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:12:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:12:37,347 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 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 18:12:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:37,805 INFO L93 Difference]: Finished difference Result 153 states and 203 transitions. [2022-01-31 18:12:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 18:12:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 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 56 [2022-01-31 18:12:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:37,806 INFO L225 Difference]: With dead ends: 153 [2022-01-31 18:12:37,806 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 18:12:37,807 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 18:12:37,807 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 330 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:37,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 34 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 18:12:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 64. [2022-01-31 18:12:37,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 58 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-01-31 18:12:37,830 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 56 [2022-01-31 18:12:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:37,830 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-01-31 18:12:37,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 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 18:12:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-01-31 18:12:37,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 18:12:37,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:37,831 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:37,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 18:12:37,832 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:37,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:37,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1355999369, now seen corresponding path program 15 times [2022-01-31 18:12:37,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:37,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880091439] [2022-01-31 18:12:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:37,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:37,834 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:37,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:37,836 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:37,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:37,998 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:37,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880091439] [2022-01-31 18:12:37,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [880091439] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:37,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:37,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 18:12:37,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972991147] [2022-01-31 18:12:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:37,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 18:12:37,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:38,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 18:12:38,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:12:38,000 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:38,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:38,466 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2022-01-31 18:12:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 18:12:38,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 18:12:38,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:38,468 INFO L225 Difference]: With dead ends: 161 [2022-01-31 18:12:38,468 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 18:12:38,469 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 18:12:38,469 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 345 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:38,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 34 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 18:12:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2022-01-31 18:12:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 61 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-01-31 18:12:38,483 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 59 [2022-01-31 18:12:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:38,483 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-01-31 18:12:38,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-01-31 18:12:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 18:12:38,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:38,484 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:38,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 18:12:38,484 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:38,485 INFO L85 PathProgramCache]: Analyzing trace with hash 356505450, now seen corresponding path program 16 times [2022-01-31 18:12:38,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:38,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363749632] [2022-01-31 18:12:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:38,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:38,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:38,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:38,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:38,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:38,681 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:38,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363749632] [2022-01-31 18:12:38,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363749632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:38,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:38,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:12:38,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719997149] [2022-01-31 18:12:38,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:38,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:12:38,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:12:38,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:12:38,682 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 18:12:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:39,240 INFO L93 Difference]: Finished difference Result 169 states and 225 transitions. [2022-01-31 18:12:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 18:12:39,241 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 62 [2022-01-31 18:12:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:39,242 INFO L225 Difference]: With dead ends: 169 [2022-01-31 18:12:39,242 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 18:12:39,243 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 18:12:39,243 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 347 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:39,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 39 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 18:12:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 70. [2022-01-31 18:12:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2022-01-31 18:12:39,258 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 62 [2022-01-31 18:12:39,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:39,258 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2022-01-31 18:12:39,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 18:12:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2022-01-31 18:12:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 18:12:39,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:39,259 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:39,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 18:12:39,259 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:39,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1966026391, now seen corresponding path program 17 times [2022-01-31 18:12:39,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:39,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934071016] [2022-01-31 18:12:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:39,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:39,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:39,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:39,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:39,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:39,472 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:39,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934071016] [2022-01-31 18:12:39,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1934071016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:39,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:39,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 18:12:39,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697878411] [2022-01-31 18:12:39,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:39,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 18:12:39,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:39,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 18:12:39,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:12:39,473 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:39,985 INFO L93 Difference]: Finished difference Result 177 states and 236 transitions. [2022-01-31 18:12:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:12:39,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 18:12:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:39,986 INFO L225 Difference]: With dead ends: 177 [2022-01-31 18:12:39,986 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 18:12:39,986 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 18:12:39,987 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 350 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:39,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 34 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 18:12:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 73. [2022-01-31 18:12:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.3134328358208955) internal successors, (88), 67 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-01-31 18:12:39,999 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 65 [2022-01-31 18:12:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:39,999 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-01-31 18:12:39,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:39,999 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-01-31 18:12:39,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 18:12:39,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:39,999 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:40,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 18:12:40,000 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2105480118, now seen corresponding path program 18 times [2022-01-31 18:12:40,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:40,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358378502] [2022-01-31 18:12:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:40,002 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:40,002 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:40,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:40,003 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:40,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:40,188 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 18:12:40,188 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:40,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358378502] [2022-01-31 18:12:40,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358378502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:40,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:40,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:12:40,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323918867] [2022-01-31 18:12:40,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:40,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:12:40,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:40,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:12:40,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:12:40,189 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 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 18:12:40,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:40,737 INFO L93 Difference]: Finished difference Result 185 states and 247 transitions. [2022-01-31 18:12:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 18:12:40,737 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 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 68 [2022-01-31 18:12:40,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:40,738 INFO L225 Difference]: With dead ends: 185 [2022-01-31 18:12:40,738 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 18:12:40,739 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 18:12:40,739 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 401 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:40,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 44 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 18:12:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 76. [2022-01-31 18:12:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 70 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-01-31 18:12:40,752 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 68 [2022-01-31 18:12:40,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:40,752 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-01-31 18:12:40,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 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 18:12:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-01-31 18:12:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 18:12:40,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:40,752 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:40,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 18:12:40,753 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:40,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:40,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2110483895, now seen corresponding path program 19 times [2022-01-31 18:12:40,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:40,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002816805] [2022-01-31 18:12:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:40,755 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:40,755 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:40,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:40,756 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:40,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:40,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:40,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002816805] [2022-01-31 18:12:40,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2002816805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:40,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:40,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 18:12:40,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577158002] [2022-01-31 18:12:40,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:40,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 18:12:40,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:40,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 18:12:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:12:40,989 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:41,569 INFO L93 Difference]: Finished difference Result 193 states and 258 transitions. [2022-01-31 18:12:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:12:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 18:12:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:41,570 INFO L225 Difference]: With dead ends: 193 [2022-01-31 18:12:41,570 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 18:12:41,570 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 18:12:41,571 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 431 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:41,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 49 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 18:12:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 79. [2022-01-31 18:12:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 73 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2022-01-31 18:12:41,595 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 71 [2022-01-31 18:12:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:41,596 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2022-01-31 18:12:41,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2022-01-31 18:12:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 18:12:41,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:41,597 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:41,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 18:12:41,597 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:41,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2129209046, now seen corresponding path program 20 times [2022-01-31 18:12:41,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:41,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662255034] [2022-01-31 18:12:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:41,600 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:41,600 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:41,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:41,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:41,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:41,820 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:41,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662255034] [2022-01-31 18:12:41,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662255034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:41,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:41,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 18:12:41,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055387229] [2022-01-31 18:12:41,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:41,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 18:12:41,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:41,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 18:12:41,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:12:41,821 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 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 18:12:42,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:42,476 INFO L93 Difference]: Finished difference Result 201 states and 269 transitions. [2022-01-31 18:12:42,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 18:12:42,477 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 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 74 [2022-01-31 18:12:42,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:42,478 INFO L225 Difference]: With dead ends: 201 [2022-01-31 18:12:42,478 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 18:12:42,478 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 18:12:42,479 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 399 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:42,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 44 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:42,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 18:12:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 82. [2022-01-31 18:12:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.3157894736842106) internal successors, (100), 76 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-01-31 18:12:42,509 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 74 [2022-01-31 18:12:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:42,509 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-01-31 18:12:42,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 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 18:12:42,509 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-01-31 18:12:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 18:12:42,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:42,510 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:42,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 18:12:42,510 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:42,510 INFO L85 PathProgramCache]: Analyzing trace with hash -423373609, now seen corresponding path program 21 times [2022-01-31 18:12:42,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:42,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828386789] [2022-01-31 18:12:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:42,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:42,512 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:42,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:42,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:42,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:42,779 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 18:12:42,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:42,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828386789] [2022-01-31 18:12:42,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [828386789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:42,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:42,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 18:12:42,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973885432] [2022-01-31 18:12:42,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:42,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 18:12:42,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:42,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 18:12:42,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:12:42,781 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:43,499 INFO L93 Difference]: Finished difference Result 209 states and 280 transitions. [2022-01-31 18:12:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 18:12:43,500 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 18:12:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:43,500 INFO L225 Difference]: With dead ends: 209 [2022-01-31 18:12:43,500 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 18:12:43,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:12:43,501 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 405 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:43,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 39 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 18:12:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 85. [2022-01-31 18:12:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 79 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2022-01-31 18:12:43,518 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 77 [2022-01-31 18:12:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:43,518 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2022-01-31 18:12:43,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2022-01-31 18:12:43,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 18:12:43,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:43,518 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:43,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 18:12:43,519 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash 67083786, now seen corresponding path program 22 times [2022-01-31 18:12:43,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:43,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399945702] [2022-01-31 18:12:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:43,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:43,521 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:43,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:43,522 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:43,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:43,758 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:43,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399945702] [2022-01-31 18:12:43,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399945702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:43,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:43,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 18:12:43,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773191741] [2022-01-31 18:12:43,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:43,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 18:12:43,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 18:12:43,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:12:43,759 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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 18:12:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:44,460 INFO L93 Difference]: Finished difference Result 217 states and 291 transitions. [2022-01-31 18:12:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 18:12:44,461 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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 80 [2022-01-31 18:12:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:44,462 INFO L225 Difference]: With dead ends: 217 [2022-01-31 18:12:44,462 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 18:12:44,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:12:44,463 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 482 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:44,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 34 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 18:12:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 88. [2022-01-31 18:12:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 82 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2022-01-31 18:12:44,482 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 80 [2022-01-31 18:12:44,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:44,482 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2022-01-31 18:12:44,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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 18:12:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2022-01-31 18:12:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 18:12:44,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:44,483 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:44,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 18:12:44,483 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:44,483 INFO L85 PathProgramCache]: Analyzing trace with hash -195402761, now seen corresponding path program 23 times [2022-01-31 18:12:44,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:44,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597858984] [2022-01-31 18:12:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:44,485 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:44,485 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:44,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:44,487 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:44,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:44,744 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:44,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597858984] [2022-01-31 18:12:44,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [597858984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:44,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:44,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:12:44,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420586351] [2022-01-31 18:12:44,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:44,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:12:44,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:44,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:12:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:12:44,746 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:45,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:45,526 INFO L93 Difference]: Finished difference Result 225 states and 302 transitions. [2022-01-31 18:12:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 18:12:45,526 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 18:12:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:45,527 INFO L225 Difference]: With dead ends: 225 [2022-01-31 18:12:45,528 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 18:12:45,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:12:45,529 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 560 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:45,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 39 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 18:12:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 91. [2022-01-31 18:12:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 85 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2022-01-31 18:12:45,548 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 83 [2022-01-31 18:12:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:45,549 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2022-01-31 18:12:45,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2022-01-31 18:12:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 18:12:45,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:45,549 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:45,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 18:12:45,549 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:45,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:45,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1203321578, now seen corresponding path program 24 times [2022-01-31 18:12:45,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:45,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027936676] [2022-01-31 18:12:45,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:45,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:45,552 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:45,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:45,553 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:45,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:45,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:45,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027936676] [2022-01-31 18:12:45,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027936676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:45,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:45,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 18:12:45,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584657002] [2022-01-31 18:12:45,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:45,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 18:12:45,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:45,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 18:12:45,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:12:45,895 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 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 18:12:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:46,847 INFO L93 Difference]: Finished difference Result 233 states and 313 transitions. [2022-01-31 18:12:46,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 18:12:46,847 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 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 86 [2022-01-31 18:12:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:46,851 INFO L225 Difference]: With dead ends: 233 [2022-01-31 18:12:46,851 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 18:12:46,852 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 18:12:46,853 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 589 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:46,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 34 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:46,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 18:12:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 94. [2022-01-31 18:12:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.3181818181818181) internal successors, (116), 88 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 121 transitions. [2022-01-31 18:12:46,881 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 121 transitions. Word has length 86 [2022-01-31 18:12:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:46,881 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 121 transitions. [2022-01-31 18:12:46,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 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 18:12:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 121 transitions. [2022-01-31 18:12:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 18:12:46,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:46,882 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:46,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 18:12:46,882 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:46,882 INFO L85 PathProgramCache]: Analyzing trace with hash 827398935, now seen corresponding path program 25 times [2022-01-31 18:12:46,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:46,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146890476] [2022-01-31 18:12:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:46,885 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:46,885 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:46,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:46,887 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:47,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:47,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:47,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146890476] [2022-01-31 18:12:47,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2146890476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:47,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:47,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 18:12:47,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379463475] [2022-01-31 18:12:47,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:47,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 18:12:47,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:47,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 18:12:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:12:47,209 INFO L87 Difference]: Start difference. First operand 94 states and 121 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:48,201 INFO L93 Difference]: Finished difference Result 241 states and 324 transitions. [2022-01-31 18:12:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 18:12:48,201 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 18:12:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:48,203 INFO L225 Difference]: With dead ends: 241 [2022-01-31 18:12:48,204 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 18:12:48,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:12:48,205 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 561 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:48,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 44 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 18:12:48,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 97. [2022-01-31 18:12:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.3186813186813187) internal successors, (120), 91 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:48,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2022-01-31 18:12:48,236 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 89 [2022-01-31 18:12:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:48,237 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2022-01-31 18:12:48,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2022-01-31 18:12:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 18:12:48,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:48,238 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:48,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 18:12:48,239 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1304318006, now seen corresponding path program 26 times [2022-01-31 18:12:48,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:48,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342898207] [2022-01-31 18:12:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:48,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:48,243 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:48,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:48,246 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:48,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:48,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:48,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342898207] [2022-01-31 18:12:48,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [342898207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:48,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:48,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 18:12:48,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745930348] [2022-01-31 18:12:48,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:48,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 18:12:48,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 18:12:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:12:48,658 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 18:12:49,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:49,777 INFO L93 Difference]: Finished difference Result 249 states and 335 transitions. [2022-01-31 18:12:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 18:12:49,777 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 92 [2022-01-31 18:12:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:49,778 INFO L225 Difference]: With dead ends: 249 [2022-01-31 18:12:49,779 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 18:12:49,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:12:49,780 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 614 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:49,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 44 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:12:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 18:12:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 100. [2022-01-31 18:12:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.3191489361702127) internal successors, (124), 94 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2022-01-31 18:12:49,828 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 92 [2022-01-31 18:12:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:49,828 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2022-01-31 18:12:49,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 18:12:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2022-01-31 18:12:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:12:49,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:49,829 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:49,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 18:12:49,829 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1897268681, now seen corresponding path program 27 times [2022-01-31 18:12:49,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:49,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273832162] [2022-01-31 18:12:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:49,840 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:49,841 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:49,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:49,843 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:50,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:50,237 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:50,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273832162] [2022-01-31 18:12:50,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1273832162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:50,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:50,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 18:12:50,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140170344] [2022-01-31 18:12:50,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:50,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 18:12:50,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:50,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 18:12:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:12:50,239 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:51,282 INFO L93 Difference]: Finished difference Result 257 states and 346 transitions. [2022-01-31 18:12:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 18:12:51,282 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 18:12:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:51,283 INFO L225 Difference]: With dead ends: 257 [2022-01-31 18:12:51,283 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 18:12:51,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:12:51,289 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 612 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:51,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 44 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 18:12:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 103. [2022-01-31 18:12:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 97 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2022-01-31 18:12:51,354 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 95 [2022-01-31 18:12:51,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:51,355 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2022-01-31 18:12:51,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:51,355 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2022-01-31 18:12:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 18:12:51,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:51,356 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:51,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 18:12:51,356 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1290339158, now seen corresponding path program 28 times [2022-01-31 18:12:51,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:51,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227755261] [2022-01-31 18:12:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:51,358 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:51,358 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:51,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:51,384 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:51,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:51,793 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 18:12:51,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:51,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227755261] [2022-01-31 18:12:51,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [227755261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:51,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:51,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 18:12:51,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571551408] [2022-01-31 18:12:51,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:51,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 18:12:51,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:51,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 18:12:51,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:12:51,795 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 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 18:12:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:52,894 INFO L93 Difference]: Finished difference Result 265 states and 357 transitions. [2022-01-31 18:12:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 18:12:52,894 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 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 98 [2022-01-31 18:12:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:52,895 INFO L225 Difference]: With dead ends: 265 [2022-01-31 18:12:52,895 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 18:12:52,896 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 18:12:52,896 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 611 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:52,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 39 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 18:12:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 106. [2022-01-31 18:12:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.32) internal successors, (132), 100 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-01-31 18:12:52,937 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 98 [2022-01-31 18:12:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:52,937 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-01-31 18:12:52,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 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 18:12:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-01-31 18:12:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 18:12:52,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:52,938 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:52,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 18:12:52,938 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2065235625, now seen corresponding path program 29 times [2022-01-31 18:12:52,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:52,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063554220] [2022-01-31 18:12:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:52,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:52,940 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:52,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:52,942 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:53,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:53,328 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:53,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063554220] [2022-01-31 18:12:53,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1063554220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:53,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:53,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 18:12:53,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397915261] [2022-01-31 18:12:53,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:53,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 18:12:53,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 18:12:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:12:53,329 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:54,479 INFO L93 Difference]: Finished difference Result 273 states and 368 transitions. [2022-01-31 18:12:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 18:12:54,480 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 18:12:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:54,481 INFO L225 Difference]: With dead ends: 273 [2022-01-31 18:12:54,481 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 18:12:54,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:12:54,483 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 696 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:54,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 34 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:54,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 18:12:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 109. [2022-01-31 18:12:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 103 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2022-01-31 18:12:54,510 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 101 [2022-01-31 18:12:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:54,510 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2022-01-31 18:12:54,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2022-01-31 18:12:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 18:12:54,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:54,511 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:54,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 18:12:54,511 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:54,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:54,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1556668022, now seen corresponding path program 30 times [2022-01-31 18:12:54,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:54,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203882700] [2022-01-31 18:12:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:54,514 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:54,514 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:54,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:54,516 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:55,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:55,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:55,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203882700] [2022-01-31 18:12:55,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [203882700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:55,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:55,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 18:12:55,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127314733] [2022-01-31 18:12:55,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:55,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 18:12:55,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:55,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 18:12:55,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:12:55,039 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 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 18:12:56,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:56,622 INFO L93 Difference]: Finished difference Result 281 states and 379 transitions. [2022-01-31 18:12:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:12:56,622 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 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 104 [2022-01-31 18:12:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:56,623 INFO L225 Difference]: With dead ends: 281 [2022-01-31 18:12:56,623 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 18:12:56,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:12:56,625 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 679 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:56,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 39 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:12:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 18:12:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 112. [2022-01-31 18:12:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.320754716981132) internal successors, (140), 106 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 145 transitions. [2022-01-31 18:12:56,663 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 145 transitions. Word has length 104 [2022-01-31 18:12:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:56,663 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 145 transitions. [2022-01-31 18:12:56,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 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 18:12:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 145 transitions. [2022-01-31 18:12:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 18:12:56,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:56,664 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:56,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 18:12:56,664 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash 831139959, now seen corresponding path program 31 times [2022-01-31 18:12:56,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:56,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045763939] [2022-01-31 18:12:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:56,667 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:56,667 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:56,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:56,669 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:57,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:57,158 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:57,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045763939] [2022-01-31 18:12:57,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045763939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:57,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:57,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 18:12:57,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951375826] [2022-01-31 18:12:57,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:57,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 18:12:57,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:57,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 18:12:57,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:12:57,160 INFO L87 Difference]: Start difference. First operand 112 states and 145 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:58,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:58,790 INFO L93 Difference]: Finished difference Result 289 states and 390 transitions. [2022-01-31 18:12:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 18:12:58,791 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 18:12:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:58,792 INFO L225 Difference]: With dead ends: 289 [2022-01-31 18:12:58,792 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 18:12:58,793 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 18:12:58,793 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 728 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:58,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 39 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:12:58,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 18:12:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 115. [2022-01-31 18:12:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.3211009174311927) internal successors, (144), 109 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:58,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2022-01-31 18:12:58,835 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 107 [2022-01-31 18:12:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:58,835 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2022-01-31 18:12:58,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2022-01-31 18:12:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 18:12:58,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:58,836 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:58,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 18:12:58,836 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:58,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1524621718, now seen corresponding path program 32 times [2022-01-31 18:12:58,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:58,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617516710] [2022-01-31 18:12:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:58,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:58,839 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:58,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:58,842 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:59,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:59,371 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:59,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617516710] [2022-01-31 18:12:59,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617516710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:59,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:59,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 18:12:59,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035578977] [2022-01-31 18:12:59,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:59,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 18:12:59,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 18:12:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:12:59,373 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 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 18:13:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:01,098 INFO L93 Difference]: Finished difference Result 297 states and 401 transitions. [2022-01-31 18:13:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 18:13:01,098 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 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 110 [2022-01-31 18:13:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:01,099 INFO L225 Difference]: With dead ends: 297 [2022-01-31 18:13:01,100 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 18:13:01,100 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 18:13:01,100 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 827 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:01,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 34 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:13:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 18:13:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 118. [2022-01-31 18:13:01,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 112 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 153 transitions. [2022-01-31 18:13:01,143 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 153 transitions. Word has length 110 [2022-01-31 18:13:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:01,144 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 153 transitions. [2022-01-31 18:13:01,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 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 18:13:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 153 transitions. [2022-01-31 18:13:01,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 18:13:01,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:01,145 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:01,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 18:13:01,145 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2039842711, now seen corresponding path program 33 times [2022-01-31 18:13:01,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:01,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554477937] [2022-01-31 18:13:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:01,148 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:01,148 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:01,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:01,151 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:01,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:01,704 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:01,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554477937] [2022-01-31 18:13:01,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554477937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:01,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:01,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 18:13:01,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930574108] [2022-01-31 18:13:01,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:01,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 18:13:01,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:01,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 18:13:01,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:13:01,706 INFO L87 Difference]: Start difference. First operand 118 states and 153 transitions. Second operand has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:03,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:03,358 INFO L93 Difference]: Finished difference Result 305 states and 412 transitions. [2022-01-31 18:13:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 18:13:03,359 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 18:13:03,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:03,360 INFO L225 Difference]: With dead ends: 305 [2022-01-31 18:13:03,360 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 18:13:03,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:13:03,361 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 788 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:03,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 39 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:13:03,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 18:13:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 121. [2022-01-31 18:13:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 115 states have (on average 1.3217391304347825) internal successors, (152), 115 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 157 transitions. [2022-01-31 18:13:03,395 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 157 transitions. Word has length 113 [2022-01-31 18:13:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:03,395 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 157 transitions. [2022-01-31 18:13:03,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 157 transitions. [2022-01-31 18:13:03,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 18:13:03,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:03,396 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:03,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 18:13:03,396 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2066746550, now seen corresponding path program 34 times [2022-01-31 18:13:03,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:03,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236023368] [2022-01-31 18:13:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:03,398 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:03,398 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:03,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:03,401 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:03,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:03,895 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:03,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236023368] [2022-01-31 18:13:03,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [236023368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:03,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:03,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 18:13:03,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236945069] [2022-01-31 18:13:03,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:03,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 18:13:03,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:03,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 18:13:03,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:13:03,897 INFO L87 Difference]: Start difference. First operand 121 states and 157 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 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 18:13:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:05,547 INFO L93 Difference]: Finished difference Result 313 states and 423 transitions. [2022-01-31 18:13:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 18:13:05,547 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 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 116 [2022-01-31 18:13:05,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:05,549 INFO L225 Difference]: With dead ends: 313 [2022-01-31 18:13:05,549 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 18:13:05,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:13:05,550 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 805 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:05,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 49 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:13:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 18:13:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 124. [2022-01-31 18:13:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.3220338983050848) internal successors, (156), 118 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2022-01-31 18:13:05,588 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 116 [2022-01-31 18:13:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:05,588 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 161 transitions. [2022-01-31 18:13:05,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 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 18:13:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 161 transitions. [2022-01-31 18:13:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 18:13:05,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:05,590 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:05,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 18:13:05,590 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash 676005559, now seen corresponding path program 35 times [2022-01-31 18:13:05,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:05,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950580108] [2022-01-31 18:13:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:05,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:05,592 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:05,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:05,595 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:06,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:06,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:06,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950580108] [2022-01-31 18:13:06,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950580108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:06,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:06,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 18:13:06,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269990871] [2022-01-31 18:13:06,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:06,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 18:13:06,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:06,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 18:13:06,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:13:06,373 INFO L87 Difference]: Start difference. First operand 124 states and 161 transitions. Second operand has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:08,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:08,174 INFO L93 Difference]: Finished difference Result 321 states and 434 transitions. [2022-01-31 18:13:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:13:08,174 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 18:13:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:08,175 INFO L225 Difference]: With dead ends: 321 [2022-01-31 18:13:08,175 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 18:13:08,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:13:08,176 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 845 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:08,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 34 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 18:13:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 127. [2022-01-31 18:13:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 121 states have (on average 1.322314049586777) internal successors, (160), 121 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2022-01-31 18:13:08,216 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 119 [2022-01-31 18:13:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:08,217 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2022-01-31 18:13:08,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2022-01-31 18:13:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 18:13:08,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:08,217 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:08,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 18:13:08,217 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:08,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1748721622, now seen corresponding path program 36 times [2022-01-31 18:13:08,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:08,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399343537] [2022-01-31 18:13:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:08,220 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:08,220 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:08,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:08,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:08,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:08,752 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399343537] [2022-01-31 18:13:08,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [399343537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:08,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:08,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 18:13:08,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435094673] [2022-01-31 18:13:08,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:08,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 18:13:08,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 18:13:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:13:08,754 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 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 18:13:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:11,237 INFO L93 Difference]: Finished difference Result 329 states and 445 transitions. [2022-01-31 18:13:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 18:13:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 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 122 [2022-01-31 18:13:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:11,239 INFO L225 Difference]: With dead ends: 329 [2022-01-31 18:13:11,240 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 18:13:11,240 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 18:13:11,241 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 733 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:11,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 54 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 18:13:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 130. [2022-01-31 18:13:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.3225806451612903) internal successors, (164), 124 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 169 transitions. [2022-01-31 18:13:11,294 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 169 transitions. Word has length 122 [2022-01-31 18:13:11,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:11,295 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 169 transitions. [2022-01-31 18:13:11,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 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 18:13:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 169 transitions. [2022-01-31 18:13:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 18:13:11,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:11,295 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:11,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 18:13:11,296 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:11,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:11,296 INFO L85 PathProgramCache]: Analyzing trace with hash 258780631, now seen corresponding path program 37 times [2022-01-31 18:13:11,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:11,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837643098] [2022-01-31 18:13:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:11,299 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:11,299 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:11,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:11,302 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:11,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:11,962 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837643098] [2022-01-31 18:13:11,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [837643098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:11,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:11,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 18:13:11,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071869302] [2022-01-31 18:13:11,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:11,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 18:13:11,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 18:13:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:13:11,963 INFO L87 Difference]: Start difference. First operand 130 states and 169 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:14,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:14,381 INFO L93 Difference]: Finished difference Result 337 states and 456 transitions. [2022-01-31 18:13:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 18:13:14,381 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 18:13:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:14,383 INFO L225 Difference]: With dead ends: 337 [2022-01-31 18:13:14,383 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 18:13:14,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:13:14,384 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 865 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:14,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 44 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:14,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 18:13:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 133. [2022-01-31 18:13:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 127 states have (on average 1.3228346456692914) internal successors, (168), 127 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2022-01-31 18:13:14,443 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 125 [2022-01-31 18:13:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:14,443 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2022-01-31 18:13:14,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2022-01-31 18:13:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 18:13:14,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:14,444 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:14,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 18:13:14,444 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:14,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:14,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1661197046, now seen corresponding path program 38 times [2022-01-31 18:13:14,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:14,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463772062] [2022-01-31 18:13:14,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:14,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:14,448 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:14,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:14,451 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:15,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:15,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463772062] [2022-01-31 18:13:15,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [463772062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:15,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:15,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 18:13:15,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327832224] [2022-01-31 18:13:15,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:15,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 18:13:15,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:15,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 18:13:15,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:13:15,178 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 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 18:13:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:17,569 INFO L93 Difference]: Finished difference Result 345 states and 467 transitions. [2022-01-31 18:13:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 18:13:17,569 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 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 128 [2022-01-31 18:13:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:17,571 INFO L225 Difference]: With dead ends: 345 [2022-01-31 18:13:17,571 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 18:13:17,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:13:17,572 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 872 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:17,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 39 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 18:13:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 136. [2022-01-31 18:13:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.323076923076923) internal successors, (172), 130 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 177 transitions. [2022-01-31 18:13:17,620 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 177 transitions. Word has length 128 [2022-01-31 18:13:17,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:17,620 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 177 transitions. [2022-01-31 18:13:17,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 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 18:13:17,620 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 177 transitions. [2022-01-31 18:13:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 18:13:17,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:17,621 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:17,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 18:13:17,621 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash 658275575, now seen corresponding path program 39 times [2022-01-31 18:13:17,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:17,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54015139] [2022-01-31 18:13:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:17,626 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:17,626 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:17,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:17,628 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:18,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:18,608 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:18,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54015139] [2022-01-31 18:13:18,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [54015139] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:18,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:18,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 18:13:18,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606795403] [2022-01-31 18:13:18,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:18,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 18:13:18,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:18,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 18:13:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:13:18,610 INFO L87 Difference]: Start difference. First operand 136 states and 177 transitions. Second operand has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:21,669 INFO L93 Difference]: Finished difference Result 353 states and 478 transitions. [2022-01-31 18:13:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 18:13:21,669 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 18:13:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:21,671 INFO L225 Difference]: With dead ends: 353 [2022-01-31 18:13:21,671 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 18:13:21,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:13:21,672 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1003 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:21,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 29 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 18:13:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 139. [2022-01-31 18:13:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 133 states have (on average 1.3233082706766917) internal successors, (176), 133 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2022-01-31 18:13:21,737 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 131 [2022-01-31 18:13:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:21,737 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2022-01-31 18:13:21,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2022-01-31 18:13:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 18:13:21,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:21,738 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:21,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 18:13:21,739 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:21,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:21,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1661697558, now seen corresponding path program 40 times [2022-01-31 18:13:21,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:21,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777969148] [2022-01-31 18:13:21,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:21,742 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:21,742 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:21,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:21,745 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:22,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:22,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:22,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777969148] [2022-01-31 18:13:22,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777969148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:22,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:22,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 18:13:22,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055607306] [2022-01-31 18:13:22,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:22,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 18:13:22,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 18:13:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:13:22,501 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 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 18:13:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:25,448 INFO L93 Difference]: Finished difference Result 361 states and 489 transitions. [2022-01-31 18:13:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 18:13:25,449 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 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 134 [2022-01-31 18:13:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:25,450 INFO L225 Difference]: With dead ends: 361 [2022-01-31 18:13:25,450 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 18:13:25,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:13:25,451 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1045 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:25,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1046 Valid, 29 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 18:13:25,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 142. [2022-01-31 18:13:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.3235294117647058) internal successors, (180), 136 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2022-01-31 18:13:25,532 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 134 [2022-01-31 18:13:25,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:25,532 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2022-01-31 18:13:25,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 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 18:13:25,532 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2022-01-31 18:13:25,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 18:13:25,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:25,533 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:25,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 18:13:25,534 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:25,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1367575529, now seen corresponding path program 41 times [2022-01-31 18:13:25,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:25,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309605348] [2022-01-31 18:13:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:25,538 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:25,538 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:25,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:25,543 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:26,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:26,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:26,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309605348] [2022-01-31 18:13:26,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [309605348] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:26,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:26,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 18:13:26,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917261839] [2022-01-31 18:13:26,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:26,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 18:13:26,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:26,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 18:13:26,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:13:26,346 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:29,514 INFO L93 Difference]: Finished difference Result 369 states and 500 transitions. [2022-01-31 18:13:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 18:13:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 18:13:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:29,516 INFO L225 Difference]: With dead ends: 369 [2022-01-31 18:13:29,516 INFO L226 Difference]: Without dead ends: 357 [2022-01-31 18:13:29,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:13:29,517 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1108 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:29,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1109 Valid, 39 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-31 18:13:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 145. [2022-01-31 18:13:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 139 states have (on average 1.3237410071942446) internal successors, (184), 139 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 189 transitions. [2022-01-31 18:13:29,587 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 189 transitions. Word has length 137 [2022-01-31 18:13:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:29,588 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 189 transitions. [2022-01-31 18:13:29,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 189 transitions. [2022-01-31 18:13:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 18:13:29,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:29,589 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:29,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 18:13:29,589 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:29,589 INFO L85 PathProgramCache]: Analyzing trace with hash -911493430, now seen corresponding path program 42 times [2022-01-31 18:13:29,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:29,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434218504] [2022-01-31 18:13:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:29,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:29,592 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:29,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:29,596 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:30,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:30,400 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 18:13:30,400 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:30,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434218504] [2022-01-31 18:13:30,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1434218504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:30,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:30,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 18:13:30,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267069908] [2022-01-31 18:13:30,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:30,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 18:13:30,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 18:13:30,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:13:30,402 INFO L87 Difference]: Start difference. First operand 145 states and 189 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 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 18:13:33,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:33,733 INFO L93 Difference]: Finished difference Result 377 states and 511 transitions. [2022-01-31 18:13:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 18:13:33,734 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 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 140 [2022-01-31 18:13:33,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:33,735 INFO L225 Difference]: With dead ends: 377 [2022-01-31 18:13:33,735 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 18:13:33,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:13:33,736 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 914 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:33,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 59 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 18:13:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 148. [2022-01-31 18:13:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.323943661971831) internal successors, (188), 142 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 193 transitions. [2022-01-31 18:13:33,809 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 193 transitions. Word has length 140 [2022-01-31 18:13:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:33,809 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 193 transitions. [2022-01-31 18:13:33,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 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 18:13:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 193 transitions. [2022-01-31 18:13:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 18:13:33,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:33,810 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:33,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 18:13:33,810 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:33,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:33,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1248760631, now seen corresponding path program 43 times [2022-01-31 18:13:33,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:33,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133237392] [2022-01-31 18:13:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:33,813 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:33,813 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:33,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:33,816 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:34,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:34,779 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 18:13:34,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:34,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133237392] [2022-01-31 18:13:34,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1133237392] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:34,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:34,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 18:13:34,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175631151] [2022-01-31 18:13:34,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:34,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 18:13:34,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 18:13:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:13:34,781 INFO L87 Difference]: Start difference. First operand 148 states and 193 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:38,087 INFO L93 Difference]: Finished difference Result 385 states and 522 transitions. [2022-01-31 18:13:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 18:13:38,087 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 18:13:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:38,089 INFO L225 Difference]: With dead ends: 385 [2022-01-31 18:13:38,089 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 18:13:38,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:13:38,090 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1020 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:38,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1021 Valid, 39 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 18:13:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 151. [2022-01-31 18:13:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 145 states have (on average 1.3241379310344827) internal successors, (192), 145 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 197 transitions. [2022-01-31 18:13:38,164 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 197 transitions. Word has length 143 [2022-01-31 18:13:38,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:38,164 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 197 transitions. [2022-01-31 18:13:38,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 197 transitions. [2022-01-31 18:13:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 18:13:38,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:38,165 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:38,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 18:13:38,166 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1587528618, now seen corresponding path program 44 times [2022-01-31 18:13:38,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:38,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316772402] [2022-01-31 18:13:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:38,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:38,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:38,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:38,172 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:39,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:39,071 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 18:13:39,071 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:39,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316772402] [2022-01-31 18:13:39,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1316772402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:39,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:39,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 18:13:39,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925699256] [2022-01-31 18:13:39,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:39,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 18:13:39,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:39,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 18:13:39,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:13:39,073 INFO L87 Difference]: Start difference. First operand 151 states and 197 transitions. Second operand has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 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 18:13:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:42,818 INFO L93 Difference]: Finished difference Result 393 states and 533 transitions. [2022-01-31 18:13:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 18:13:42,818 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 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 146 [2022-01-31 18:13:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:42,820 INFO L225 Difference]: With dead ends: 393 [2022-01-31 18:13:42,820 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 18:13:42,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:13:42,821 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1206 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:42,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 54 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 18:13:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 154. [2022-01-31 18:13:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 148 states have (on average 1.3243243243243243) internal successors, (196), 148 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 201 transitions. [2022-01-31 18:13:42,902 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 201 transitions. Word has length 146 [2022-01-31 18:13:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:42,902 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 201 transitions. [2022-01-31 18:13:42,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 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 18:13:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 201 transitions. [2022-01-31 18:13:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 18:13:42,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:42,903 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:42,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 18:13:42,903 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:42,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:42,904 INFO L85 PathProgramCache]: Analyzing trace with hash 651483735, now seen corresponding path program 45 times [2022-01-31 18:13:42,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:42,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973862602] [2022-01-31 18:13:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:42,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:42,907 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:42,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:42,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:43,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:43,828 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:43,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973862602] [2022-01-31 18:13:43,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [973862602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:43,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:43,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 18:13:43,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845737824] [2022-01-31 18:13:43,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:43,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 18:13:43,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:43,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 18:13:43,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:13:43,830 INFO L87 Difference]: Start difference. First operand 154 states and 201 transitions. Second operand has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:47,696 INFO L93 Difference]: Finished difference Result 401 states and 544 transitions. [2022-01-31 18:13:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 18:13:47,697 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-01-31 18:13:47,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:47,698 INFO L225 Difference]: With dead ends: 401 [2022-01-31 18:13:47,698 INFO L226 Difference]: Without dead ends: 389 [2022-01-31 18:13:47,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:13:47,700 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1051 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:47,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1052 Valid, 54 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-31 18:13:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 157. [2022-01-31 18:13:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 151 states have (on average 1.3245033112582782) internal successors, (200), 151 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 205 transitions. [2022-01-31 18:13:47,791 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 205 transitions. Word has length 149 [2022-01-31 18:13:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:47,791 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 205 transitions. [2022-01-31 18:13:47,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 205 transitions. [2022-01-31 18:13:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 18:13:47,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:47,792 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:47,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 18:13:47,792 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:47,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2133940086, now seen corresponding path program 46 times [2022-01-31 18:13:47,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:47,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146954149] [2022-01-31 18:13:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:47,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:47,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:47,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:47,799 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:48,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:48,760 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:48,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146954149] [2022-01-31 18:13:48,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [146954149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:48,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:48,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 18:13:48,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825515243] [2022-01-31 18:13:48,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:48,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 18:13:48,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:48,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 18:13:48,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:13:48,761 INFO L87 Difference]: Start difference. First operand 157 states and 205 transitions. Second operand has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 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 18:13:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:52,519 INFO L93 Difference]: Finished difference Result 409 states and 555 transitions. [2022-01-31 18:13:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 18:13:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 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 152 [2022-01-31 18:13:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:52,521 INFO L225 Difference]: With dead ends: 409 [2022-01-31 18:13:52,521 INFO L226 Difference]: Without dead ends: 397 [2022-01-31 18:13:52,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:13:52,522 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1209 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:52,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 39 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:52,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-31 18:13:52,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 160. [2022-01-31 18:13:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.3246753246753247) internal successors, (204), 154 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 209 transitions. [2022-01-31 18:13:52,625 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 209 transitions. Word has length 152 [2022-01-31 18:13:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:52,625 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 209 transitions. [2022-01-31 18:13:52,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 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 18:13:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 209 transitions. [2022-01-31 18:13:52,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 18:13:52,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:52,626 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:52,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 18:13:52,626 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash 368134519, now seen corresponding path program 47 times [2022-01-31 18:13:52,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:52,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885105845] [2022-01-31 18:13:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:52,629 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:52,629 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:52,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:52,632 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:53,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:53,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:53,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885105845] [2022-01-31 18:13:53,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [885105845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:53,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:53,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 18:13:53,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338229881] [2022-01-31 18:13:53,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:53,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 18:13:53,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:53,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 18:13:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:13:53,520 INFO L87 Difference]: Start difference. First operand 160 states and 209 transitions. Second operand has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:57,074 INFO L93 Difference]: Finished difference Result 417 states and 566 transitions. [2022-01-31 18:13:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 18:13:57,075 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 18:13:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:57,076 INFO L225 Difference]: With dead ends: 417 [2022-01-31 18:13:57,076 INFO L226 Difference]: Without dead ends: 405 [2022-01-31 18:13:57,077 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 18:13:57,077 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1189 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:57,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1190 Valid, 39 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-31 18:13:57,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 163. [2022-01-31 18:13:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.3248407643312101) internal successors, (208), 157 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:57,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 213 transitions. [2022-01-31 18:13:57,146 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 213 transitions. Word has length 155 [2022-01-31 18:13:57,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:57,147 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 213 transitions. [2022-01-31 18:13:57,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:57,147 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 213 transitions. [2022-01-31 18:13:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 18:13:57,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:57,147 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:57,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 18:13:57,148 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:57,148 INFO L85 PathProgramCache]: Analyzing trace with hash 515269994, now seen corresponding path program 48 times [2022-01-31 18:13:57,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:57,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162206540] [2022-01-31 18:13:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:57,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:57,150 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:57,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:57,153 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:58,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:58,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:58,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162206540] [2022-01-31 18:13:58,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [162206540] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:58,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:58,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 18:13:58,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615359786] [2022-01-31 18:13:58,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:58,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 18:13:58,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:58,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 18:13:58,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:13:58,032 INFO L87 Difference]: Start difference. First operand 163 states and 213 transitions. Second operand has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 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 18:14:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:01,531 INFO L93 Difference]: Finished difference Result 425 states and 577 transitions. [2022-01-31 18:14:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 18:14:01,532 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 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 158 [2022-01-31 18:14:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:01,534 INFO L225 Difference]: With dead ends: 425 [2022-01-31 18:14:01,534 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 18:14:01,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:14:01,535 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1518 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:01,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 34 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 18:14:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 166. [2022-01-31 18:14:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.325) internal successors, (212), 160 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 217 transitions. [2022-01-31 18:14:01,615 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 217 transitions. Word has length 158 [2022-01-31 18:14:01,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:01,616 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 217 transitions. [2022-01-31 18:14:01,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 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 18:14:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 217 transitions. [2022-01-31 18:14:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 18:14:01,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:01,617 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:01,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 18:14:01,617 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:01,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:01,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1333403497, now seen corresponding path program 49 times [2022-01-31 18:14:01,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:01,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036853577] [2022-01-31 18:14:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:01,620 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:01,620 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:01,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:01,626 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:02,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:02,397 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036853577] [2022-01-31 18:14:02,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2036853577] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:02,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:02,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 18:14:02,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740295585] [2022-01-31 18:14:02,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:02,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 18:14:02,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:02,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 18:14:02,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:14:02,399 INFO L87 Difference]: Start difference. First operand 166 states and 217 transitions. Second operand has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:05,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:05,732 INFO L93 Difference]: Finished difference Result 433 states and 588 transitions. [2022-01-31 18:14:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 18:14:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 18:14:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:05,734 INFO L225 Difference]: With dead ends: 433 [2022-01-31 18:14:05,734 INFO L226 Difference]: Without dead ends: 421 [2022-01-31 18:14:05,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:14:05,735 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1263 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:05,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 44 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:05,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-31 18:14:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 169. [2022-01-31 18:14:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.3251533742331287) internal successors, (216), 163 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 221 transitions. [2022-01-31 18:14:05,809 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 221 transitions. Word has length 161 [2022-01-31 18:14:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:05,810 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 221 transitions. [2022-01-31 18:14:05,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 221 transitions. [2022-01-31 18:14:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 18:14:05,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:05,810 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:05,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 18:14:05,811 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:05,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:05,811 INFO L85 PathProgramCache]: Analyzing trace with hash -799737270, now seen corresponding path program 50 times [2022-01-31 18:14:05,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:05,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842668869] [2022-01-31 18:14:05,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:05,813 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:05,813 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:05,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:05,816 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:06,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:06,770 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:06,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842668869] [2022-01-31 18:14:06,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [842668869] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:06,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:06,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 18:14:06,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179787951] [2022-01-31 18:14:06,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:06,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 18:14:06,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:06,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 18:14:06,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:14:06,772 INFO L87 Difference]: Start difference. First operand 169 states and 221 transitions. Second operand has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 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 18:14:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:10,666 INFO L93 Difference]: Finished difference Result 441 states and 599 transitions. [2022-01-31 18:14:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 18:14:10,666 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 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 164 [2022-01-31 18:14:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:10,668 INFO L225 Difference]: With dead ends: 441 [2022-01-31 18:14:10,668 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 18:14:10,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:14:10,669 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1136 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:10,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 54 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:14:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 18:14:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 172. [2022-01-31 18:14:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.3253012048192772) internal successors, (220), 166 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 225 transitions. [2022-01-31 18:14:10,749 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 225 transitions. Word has length 164 [2022-01-31 18:14:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:10,749 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 225 transitions. [2022-01-31 18:14:10,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 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 18:14:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 225 transitions. [2022-01-31 18:14:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 18:14:10,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:10,750 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:10,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 18:14:10,750 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:10,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1976868791, now seen corresponding path program 51 times [2022-01-31 18:14:10,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:10,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100928145] [2022-01-31 18:14:10,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:10,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:10,752 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:10,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:10,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:11,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:11,746 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 18:14:11,746 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:11,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100928145] [2022-01-31 18:14:11,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1100928145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:11,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:11,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 18:14:11,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830522965] [2022-01-31 18:14:11,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:11,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 18:14:11,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 18:14:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:14:11,748 INFO L87 Difference]: Start difference. First operand 172 states and 225 transitions. Second operand has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:15,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:15,676 INFO L93 Difference]: Finished difference Result 449 states and 610 transitions. [2022-01-31 18:14:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 18:14:15,681 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 18:14:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:15,683 INFO L225 Difference]: With dead ends: 449 [2022-01-31 18:14:15,683 INFO L226 Difference]: Without dead ends: 437 [2022-01-31 18:14:15,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:14:15,684 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1154 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:15,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1155 Valid, 49 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-01-31 18:14:15,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 175. [2022-01-31 18:14:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 169 states have (on average 1.3254437869822486) internal successors, (224), 169 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 229 transitions. [2022-01-31 18:14:15,766 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 229 transitions. Word has length 167 [2022-01-31 18:14:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:15,766 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 229 transitions. [2022-01-31 18:14:15,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 229 transitions. [2022-01-31 18:14:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 18:14:15,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:15,767 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:15,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 18:14:15,767 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:15,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1222088918, now seen corresponding path program 52 times [2022-01-31 18:14:15,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:15,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685425699] [2022-01-31 18:14:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:15,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:15,769 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:15,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:15,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:16,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:16,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:16,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685425699] [2022-01-31 18:14:16,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1685425699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:16,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:16,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 18:14:16,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028639809] [2022-01-31 18:14:16,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:16,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 18:14:16,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:16,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 18:14:16,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:14:16,657 INFO L87 Difference]: Start difference. First operand 175 states and 229 transitions. Second operand has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 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 18:14:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:20,613 INFO L93 Difference]: Finished difference Result 457 states and 621 transitions. [2022-01-31 18:14:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 18:14:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 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 170 [2022-01-31 18:14:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:20,615 INFO L225 Difference]: With dead ends: 457 [2022-01-31 18:14:20,616 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 18:14:20,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:14:20,616 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1347 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1348 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:20,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1348 Valid, 34 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 18:14:20,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 178. [2022-01-31 18:14:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 172 states have (on average 1.3255813953488371) internal successors, (228), 172 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 233 transitions. [2022-01-31 18:14:20,708 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 233 transitions. Word has length 170 [2022-01-31 18:14:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:20,708 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 233 transitions. [2022-01-31 18:14:20,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 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 18:14:20,709 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 233 transitions. [2022-01-31 18:14:20,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 18:14:20,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:20,709 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:20,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 18:14:20,709 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:20,710 INFO L85 PathProgramCache]: Analyzing trace with hash -341866793, now seen corresponding path program 53 times [2022-01-31 18:14:20,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:20,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051433794] [2022-01-31 18:14:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:20,711 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:20,711 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:20,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:20,715 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:21,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:21,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:21,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051433794] [2022-01-31 18:14:21,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051433794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:21,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:21,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 18:14:21,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823442889] [2022-01-31 18:14:21,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:21,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 18:14:21,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:21,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 18:14:21,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:14:21,655 INFO L87 Difference]: Start difference. First operand 178 states and 233 transitions. Second operand has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:26,097 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2022-01-31 18:14:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 18:14:26,097 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-01-31 18:14:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:26,098 INFO L225 Difference]: With dead ends: 465 [2022-01-31 18:14:26,098 INFO L226 Difference]: Without dead ends: 453 [2022-01-31 18:14:26,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:14:26,099 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1368 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:26,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1369 Valid, 29 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:14:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-31 18:14:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 181. [2022-01-31 18:14:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 175 states have internal predecessors, (232), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 237 transitions. [2022-01-31 18:14:26,187 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 237 transitions. Word has length 173 [2022-01-31 18:14:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:26,192 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 237 transitions. [2022-01-31 18:14:26,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 237 transitions. [2022-01-31 18:14:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 18:14:26,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:26,192 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:26,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 18:14:26,193 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:26,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:26,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1580117002, now seen corresponding path program 54 times [2022-01-31 18:14:26,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:26,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443577512] [2022-01-31 18:14:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:26,208 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:26,208 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:26,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:26,212 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:27,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:27,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:27,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443577512] [2022-01-31 18:14:27,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [443577512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:27,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:27,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 18:14:27,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413142874] [2022-01-31 18:14:27,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:27,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 18:14:27,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 18:14:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:14:27,266 INFO L87 Difference]: Start difference. First operand 181 states and 237 transitions. Second operand has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 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 18:14:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:31,862 INFO L93 Difference]: Finished difference Result 473 states and 643 transitions. [2022-01-31 18:14:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 18:14:31,863 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 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 176 [2022-01-31 18:14:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:31,864 INFO L225 Difference]: With dead ends: 473 [2022-01-31 18:14:31,864 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 18:14:31,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:14:31,865 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1468 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:31,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 24 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:14:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 18:14:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 184. [2022-01-31 18:14:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.3258426966292134) internal successors, (236), 178 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 241 transitions. [2022-01-31 18:14:31,982 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 241 transitions. Word has length 176 [2022-01-31 18:14:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:31,982 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 241 transitions. [2022-01-31 18:14:31,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 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 18:14:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 241 transitions. [2022-01-31 18:14:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 18:14:31,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:31,983 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:31,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 18:14:31,983 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1104636425, now seen corresponding path program 55 times [2022-01-31 18:14:31,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:31,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231536313] [2022-01-31 18:14:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:31,986 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:31,986 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:31,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:31,989 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:33,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:33,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231536313] [2022-01-31 18:14:33,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [231536313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:33,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:33,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 18:14:33,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510392732] [2022-01-31 18:14:33,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:33,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 18:14:33,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:33,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 18:14:33,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:14:33,041 INFO L87 Difference]: Start difference. First operand 184 states and 241 transitions. Second operand has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:38,810 INFO L93 Difference]: Finished difference Result 481 states and 654 transitions. [2022-01-31 18:14:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 18:14:38,810 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 18:14:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:38,812 INFO L225 Difference]: With dead ends: 481 [2022-01-31 18:14:38,812 INFO L226 Difference]: Without dead ends: 469 [2022-01-31 18:14:38,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:14:38,813 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1288 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:38,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1289 Valid, 44 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:14:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-31 18:14:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 187. [2022-01-31 18:14:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 181 states have (on average 1.3259668508287292) internal successors, (240), 181 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 245 transitions. [2022-01-31 18:14:38,954 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 245 transitions. Word has length 179 [2022-01-31 18:14:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:38,955 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 245 transitions. [2022-01-31 18:14:38,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 245 transitions. [2022-01-31 18:14:38,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 18:14:38,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:38,956 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:38,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 18:14:38,956 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:38,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1712994070, now seen corresponding path program 56 times [2022-01-31 18:14:38,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:38,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101109548] [2022-01-31 18:14:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:38,959 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:38,959 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:38,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:38,964 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:40,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:40,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:40,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101109548] [2022-01-31 18:14:40,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1101109548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:40,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:40,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 18:14:40,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278556581] [2022-01-31 18:14:40,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:40,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 18:14:40,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:40,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 18:14:40,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:14:40,329 INFO L87 Difference]: Start difference. First operand 187 states and 245 transitions. Second operand has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 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 18:14:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:47,644 INFO L93 Difference]: Finished difference Result 489 states and 665 transitions. [2022-01-31 18:14:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 18:14:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 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 182 [2022-01-31 18:14:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:47,646 INFO L225 Difference]: With dead ends: 489 [2022-01-31 18:14:47,646 INFO L226 Difference]: Without dead ends: 477 [2022-01-31 18:14:47,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:14:47,648 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1413 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:47,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 39 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:14:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-31 18:14:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 190. [2022-01-31 18:14:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.326086956521739) internal successors, (244), 184 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 249 transitions. [2022-01-31 18:14:47,792 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 249 transitions. Word has length 182 [2022-01-31 18:14:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:47,792 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 249 transitions. [2022-01-31 18:14:47,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 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 18:14:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 249 transitions. [2022-01-31 18:14:47,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 18:14:47,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:47,793 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:47,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 18:14:47,793 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash -533607145, now seen corresponding path program 57 times [2022-01-31 18:14:47,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:47,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389374929] [2022-01-31 18:14:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:47,796 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:47,796 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:47,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:47,801 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:49,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:49,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:49,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389374929] [2022-01-31 18:14:49,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1389374929] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:49,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:49,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 18:14:49,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107538994] [2022-01-31 18:14:49,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:49,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 18:14:49,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 18:14:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:14:49,183 INFO L87 Difference]: Start difference. First operand 190 states and 249 transitions. Second operand has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:56,721 INFO L93 Difference]: Finished difference Result 497 states and 676 transitions. [2022-01-31 18:14:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 18:14:56,721 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 18:14:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:56,723 INFO L225 Difference]: With dead ends: 497 [2022-01-31 18:14:56,723 INFO L226 Difference]: Without dead ends: 485 [2022-01-31 18:14:56,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:14:56,724 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1247 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:56,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1248 Valid, 49 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:14:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-31 18:14:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 193. [2022-01-31 18:14:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 187 states have (on average 1.3262032085561497) internal successors, (248), 187 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 253 transitions. [2022-01-31 18:14:56,863 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 253 transitions. Word has length 185 [2022-01-31 18:14:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:56,864 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 253 transitions. [2022-01-31 18:14:56,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 253 transitions. [2022-01-31 18:14:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 18:14:56,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:56,865 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:56,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 18:14:56,865 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:56,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1749794250, now seen corresponding path program 58 times [2022-01-31 18:14:56,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:56,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368437012] [2022-01-31 18:14:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:56,867 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:56,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:56,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:56,872 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:58,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:58,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:58,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368437012] [2022-01-31 18:14:58,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368437012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:58,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:58,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 18:14:58,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422436430] [2022-01-31 18:14:58,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:58,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 18:14:58,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 18:14:58,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:14:58,309 INFO L87 Difference]: Start difference. First operand 193 states and 253 transitions. Second operand has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 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 18:15:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:06,207 INFO L93 Difference]: Finished difference Result 505 states and 687 transitions. [2022-01-31 18:15:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 18:15:06,207 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 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 188 [2022-01-31 18:15:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:06,209 INFO L225 Difference]: With dead ends: 505 [2022-01-31 18:15:06,209 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 18:15:06,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:15:06,211 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1448 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:06,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1449 Valid, 44 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:15:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 18:15:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 196. [2022-01-31 18:15:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.3263157894736841) internal successors, (252), 190 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 257 transitions. [2022-01-31 18:15:06,364 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 257 transitions. Word has length 188 [2022-01-31 18:15:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:06,364 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 257 transitions. [2022-01-31 18:15:06,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 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 18:15:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 257 transitions. [2022-01-31 18:15:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 18:15:06,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:06,365 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:06,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 18:15:06,366 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:06,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1426248649, now seen corresponding path program 59 times [2022-01-31 18:15:06,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:06,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885841658] [2022-01-31 18:15:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:06,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:06,368 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:06,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:06,373 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:07,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:07,884 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 18:15:07,884 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885841658] [2022-01-31 18:15:07,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [885841658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:07,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:07,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 18:15:07,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223516812] [2022-01-31 18:15:07,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:07,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 18:15:07,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 18:15:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:15:07,886 INFO L87 Difference]: Start difference. First operand 196 states and 257 transitions. Second operand has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:16,275 INFO L93 Difference]: Finished difference Result 513 states and 698 transitions. [2022-01-31 18:15:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 18:15:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 18:15:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:16,277 INFO L225 Difference]: With dead ends: 513 [2022-01-31 18:15:16,277 INFO L226 Difference]: Without dead ends: 501 [2022-01-31 18:15:16,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:15:16,279 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1598 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1599 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:16,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1599 Valid, 34 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:15:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-31 18:15:16,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 199. [2022-01-31 18:15:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.3264248704663213) internal successors, (256), 193 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 261 transitions. [2022-01-31 18:15:16,435 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 261 transitions. Word has length 191 [2022-01-31 18:15:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:16,435 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 261 transitions. [2022-01-31 18:15:16,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 261 transitions. [2022-01-31 18:15:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 18:15:16,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:16,437 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:16,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 18:15:16,437 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:16,437 INFO L85 PathProgramCache]: Analyzing trace with hash -790721878, now seen corresponding path program 60 times [2022-01-31 18:15:16,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:16,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329962312] [2022-01-31 18:15:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:16,439 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:16,439 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:16,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:16,445 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:17,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:17,965 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:17,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329962312] [2022-01-31 18:15:17,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1329962312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:17,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:17,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 18:15:17,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710341461] [2022-01-31 18:15:17,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:17,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 18:15:17,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:17,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 18:15:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:15:17,968 INFO L87 Difference]: Start difference. First operand 199 states and 261 transitions. Second operand has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 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 18:15:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:25,249 INFO L93 Difference]: Finished difference Result 521 states and 709 transitions. [2022-01-31 18:15:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 18:15:25,251 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 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 194 [2022-01-31 18:15:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:25,253 INFO L225 Difference]: With dead ends: 521 [2022-01-31 18:15:25,253 INFO L226 Difference]: Without dead ends: 509 [2022-01-31 18:15:25,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:15:25,254 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1332 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:25,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1333 Valid, 54 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:15:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-31 18:15:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 202. [2022-01-31 18:15:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.3265306122448979) internal successors, (260), 196 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 265 transitions. [2022-01-31 18:15:25,374 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 265 transitions. Word has length 194 [2022-01-31 18:15:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:25,374 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 265 transitions. [2022-01-31 18:15:25,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 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 18:15:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 265 transitions. [2022-01-31 18:15:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 18:15:25,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:25,375 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:25,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 18:15:25,375 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash -28527785, now seen corresponding path program 61 times [2022-01-31 18:15:25,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:25,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113227746] [2022-01-31 18:15:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:25,378 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:25,378 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:25,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:25,387 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:26,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:26,754 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 18:15:26,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:26,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113227746] [2022-01-31 18:15:26,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113227746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:26,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:26,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 18:15:26,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715008619] [2022-01-31 18:15:26,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:26,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 18:15:26,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:26,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 18:15:26,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:15:26,756 INFO L87 Difference]: Start difference. First operand 202 states and 265 transitions. Second operand has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:34,927 INFO L93 Difference]: Finished difference Result 529 states and 720 transitions. [2022-01-31 18:15:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 18:15:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-01-31 18:15:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:34,929 INFO L225 Difference]: With dead ends: 529 [2022-01-31 18:15:34,929 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 18:15:34,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:15:34,931 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1572 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:34,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1573 Valid, 39 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:15:34,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 18:15:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 205. [2022-01-31 18:15:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.3266331658291457) internal successors, (264), 199 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 269 transitions. [2022-01-31 18:15:35,095 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 269 transitions. Word has length 197 [2022-01-31 18:15:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:35,095 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 269 transitions. [2022-01-31 18:15:35,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 269 transitions. [2022-01-31 18:15:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 18:15:35,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:35,096 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:35,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 18:15:35,097 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:35,097 INFO L85 PathProgramCache]: Analyzing trace with hash -996397174, now seen corresponding path program 62 times [2022-01-31 18:15:35,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:35,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973238941] [2022-01-31 18:15:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:35,099 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:35,099 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:35,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:35,104 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:36,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:36,750 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:36,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973238941] [2022-01-31 18:15:36,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [973238941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:36,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:36,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 18:15:36,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637162701] [2022-01-31 18:15:36,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:36,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 18:15:36,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 18:15:36,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:15:36,752 INFO L87 Difference]: Start difference. First operand 205 states and 269 transitions. Second operand has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 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 18:15:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:46,345 INFO L93 Difference]: Finished difference Result 537 states and 731 transitions. [2022-01-31 18:15:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 18:15:46,346 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 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 200 [2022-01-31 18:15:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:46,347 INFO L225 Difference]: With dead ends: 537 [2022-01-31 18:15:46,347 INFO L226 Difference]: Without dead ends: 525 [2022-01-31 18:15:46,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:15:46,348 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1457 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:46,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1458 Valid, 44 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [669 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:15:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-31 18:15:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 208. [2022-01-31 18:15:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.3267326732673268) internal successors, (268), 202 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 273 transitions. [2022-01-31 18:15:46,494 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 273 transitions. Word has length 200 [2022-01-31 18:15:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:46,494 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 273 transitions. [2022-01-31 18:15:46,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 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 18:15:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 273 transitions. [2022-01-31 18:15:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 18:15:46,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:46,495 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:46,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 18:15:46,495 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1617060471, now seen corresponding path program 63 times [2022-01-31 18:15:46,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:46,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428989006] [2022-01-31 18:15:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:46,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:46,498 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:46,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:46,502 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:47,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:47,983 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 18:15:47,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:47,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428989006] [2022-01-31 18:15:47,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1428989006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:47,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:47,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 18:15:47,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127272075] [2022-01-31 18:15:47,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:47,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 18:15:47,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:47,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 18:15:47,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:15:47,986 INFO L87 Difference]: Start difference. First operand 208 states and 273 transitions. Second operand has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:56,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:56,405 INFO L93 Difference]: Finished difference Result 545 states and 742 transitions. [2022-01-31 18:15:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 18:15:56,406 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 18:15:56,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:56,407 INFO L225 Difference]: With dead ends: 545 [2022-01-31 18:15:56,407 INFO L226 Difference]: Without dead ends: 533 [2022-01-31 18:15:56,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:15:56,408 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1495 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:56,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 44 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:15:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-31 18:15:56,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 211. [2022-01-31 18:15:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 205 states have (on average 1.326829268292683) internal successors, (272), 205 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2022-01-31 18:15:56,543 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 203 [2022-01-31 18:15:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:56,544 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2022-01-31 18:15:56,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2022-01-31 18:15:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 18:15:56,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:56,544 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:56,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 18:15:56,545 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:56,545 INFO L85 PathProgramCache]: Analyzing trace with hash -33379222, now seen corresponding path program 64 times [2022-01-31 18:15:56,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:56,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990346598] [2022-01-31 18:15:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:56,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:56,547 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:56,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:56,551 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:57,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:57,927 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:57,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990346598] [2022-01-31 18:15:57,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1990346598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:57,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:57,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 18:15:57,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769566672] [2022-01-31 18:15:57,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:57,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 18:15:57,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:57,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 18:15:57,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:15:57,929 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 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 18:16:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:05,286 INFO L93 Difference]: Finished difference Result 553 states and 753 transitions. [2022-01-31 18:16:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 18:16:05,286 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 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 206 [2022-01-31 18:16:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:05,288 INFO L225 Difference]: With dead ends: 553 [2022-01-31 18:16:05,288 INFO L226 Difference]: Without dead ends: 541 [2022-01-31 18:16:05,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:16:05,289 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1683 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:05,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1684 Valid, 39 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:05,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-31 18:16:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 214. [2022-01-31 18:16:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.3269230769230769) internal successors, (276), 208 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 281 transitions. [2022-01-31 18:16:05,437 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 281 transitions. Word has length 206 [2022-01-31 18:16:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:05,437 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 281 transitions. [2022-01-31 18:16:05,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 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 18:16:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 281 transitions. [2022-01-31 18:16:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 18:16:05,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:05,438 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:05,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 18:16:05,438 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:05,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:05,438 INFO L85 PathProgramCache]: Analyzing trace with hash 503331223, now seen corresponding path program 65 times [2022-01-31 18:16:05,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:05,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475116454] [2022-01-31 18:16:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:05,444 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:05,444 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:05,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:05,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:06,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:06,962 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:06,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475116454] [2022-01-31 18:16:06,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1475116454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:06,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:06,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 18:16:06,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614907294] [2022-01-31 18:16:06,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:06,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 18:16:06,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:06,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 18:16:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:16:06,964 INFO L87 Difference]: Start difference. First operand 214 states and 281 transitions. Second operand has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:15,345 INFO L93 Difference]: Finished difference Result 561 states and 764 transitions. [2022-01-31 18:16:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:16:15,345 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 18:16:15,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:15,347 INFO L225 Difference]: With dead ends: 561 [2022-01-31 18:16:15,347 INFO L226 Difference]: Without dead ends: 549 [2022-01-31 18:16:15,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:16:15,348 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1504 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:15,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 49 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-31 18:16:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 217. [2022-01-31 18:16:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 211 states have (on average 1.3270142180094786) internal successors, (280), 211 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 285 transitions. [2022-01-31 18:16:15,508 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 285 transitions. Word has length 209 [2022-01-31 18:16:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:15,508 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 285 transitions. [2022-01-31 18:16:15,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:15,523 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 285 transitions. [2022-01-31 18:16:15,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 18:16:15,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:15,524 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:15,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 18:16:15,524 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash -519044790, now seen corresponding path program 66 times [2022-01-31 18:16:15,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:15,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586874526] [2022-01-31 18:16:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:15,526 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:15,526 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:15,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:15,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:17,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:17,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586874526] [2022-01-31 18:16:17,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1586874526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:17,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:17,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 18:16:17,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054176299] [2022-01-31 18:16:17,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:17,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 18:16:17,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:17,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 18:16:17,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:16:17,090 INFO L87 Difference]: Start difference. First operand 217 states and 285 transitions. Second operand has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 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 18:16:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:25,246 INFO L93 Difference]: Finished difference Result 569 states and 775 transitions. [2022-01-31 18:16:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 18:16:25,246 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 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 212 [2022-01-31 18:16:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:25,248 INFO L225 Difference]: With dead ends: 569 [2022-01-31 18:16:25,248 INFO L226 Difference]: Without dead ends: 557 [2022-01-31 18:16:25,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:16:25,250 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1514 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:25,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 39 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:16:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-31 18:16:25,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 220. [2022-01-31 18:16:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.3271028037383177) internal successors, (284), 214 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 289 transitions. [2022-01-31 18:16:25,409 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 289 transitions. Word has length 212 [2022-01-31 18:16:25,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:25,410 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 289 transitions. [2022-01-31 18:16:25,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 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 18:16:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 289 transitions. [2022-01-31 18:16:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 18:16:25,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:25,411 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:25,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 18:16:25,411 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:25,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1785215159, now seen corresponding path program 67 times [2022-01-31 18:16:25,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:25,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361745529] [2022-01-31 18:16:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:25,413 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:25,413 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:25,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:25,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:26,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:26,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361745529] [2022-01-31 18:16:26,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361745529] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:26,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:26,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 18:16:26,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940979936] [2022-01-31 18:16:26,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:26,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:16:26,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:26,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:16:26,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:16:26,850 INFO L87 Difference]: Start difference. First operand 220 states and 289 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:35,386 INFO L93 Difference]: Finished difference Result 577 states and 786 transitions. [2022-01-31 18:16:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 18:16:35,386 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 18:16:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:35,388 INFO L225 Difference]: With dead ends: 577 [2022-01-31 18:16:35,388 INFO L226 Difference]: Without dead ends: 565 [2022-01-31 18:16:35,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:16:35,389 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1846 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1847 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:35,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1847 Valid, 39 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:16:35,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-31 18:16:35,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 223. [2022-01-31 18:16:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.327188940092166) internal successors, (288), 217 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 293 transitions. [2022-01-31 18:16:35,536 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 293 transitions. Word has length 215 [2022-01-31 18:16:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:35,537 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 293 transitions. [2022-01-31 18:16:35,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 293 transitions. [2022-01-31 18:16:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 18:16:35,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:35,537 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:35,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 18:16:35,538 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1531063850, now seen corresponding path program 68 times [2022-01-31 18:16:35,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:35,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5307963] [2022-01-31 18:16:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:35,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:35,540 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:35,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:35,545 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:37,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:37,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:37,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5307963] [2022-01-31 18:16:37,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [5307963] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:37,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:37,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 18:16:37,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301573974] [2022-01-31 18:16:37,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:37,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 18:16:37,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:37,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 18:16:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:16:37,275 INFO L87 Difference]: Start difference. First operand 223 states and 293 transitions. Second operand has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 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 18:16:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:47,688 INFO L93 Difference]: Finished difference Result 585 states and 797 transitions. [2022-01-31 18:16:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:16:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 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 218 [2022-01-31 18:16:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:47,690 INFO L225 Difference]: With dead ends: 585 [2022-01-31 18:16:47,690 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 18:16:47,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:16:47,692 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1698 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 787 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1699 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 787 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:47,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1699 Valid, 44 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [787 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:16:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 18:16:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 226. [2022-01-31 18:16:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.3272727272727274) internal successors, (292), 220 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 297 transitions. [2022-01-31 18:16:47,841 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 297 transitions. Word has length 218 [2022-01-31 18:16:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:47,841 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 297 transitions. [2022-01-31 18:16:47,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 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 18:16:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 297 transitions. [2022-01-31 18:16:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 18:16:47,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:47,842 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:47,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 18:16:47,842 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2136760279, now seen corresponding path program 69 times [2022-01-31 18:16:47,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:47,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642043101] [2022-01-31 18:16:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:47,844 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:47,844 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:47,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:47,849 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:49,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:49,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:49,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642043101] [2022-01-31 18:16:49,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [642043101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:49,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:49,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 18:16:49,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536527092] [2022-01-31 18:16:49,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:49,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 18:16:49,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:49,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 18:16:49,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:16:49,410 INFO L87 Difference]: Start difference. First operand 226 states and 297 transitions. Second operand has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:58,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:58,807 INFO L93 Difference]: Finished difference Result 593 states and 808 transitions. [2022-01-31 18:16:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:16:58,807 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-01-31 18:16:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:58,809 INFO L225 Difference]: With dead ends: 593 [2022-01-31 18:16:58,809 INFO L226 Difference]: Without dead ends: 581 [2022-01-31 18:16:58,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:16:58,810 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1699 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 790 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:58,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1700 Valid, 54 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [790 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:16:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-31 18:16:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 229. [2022-01-31 18:16:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 223 states have (on average 1.3273542600896862) internal successors, (296), 223 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 301 transitions. [2022-01-31 18:16:58,968 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 301 transitions. Word has length 221 [2022-01-31 18:16:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:58,968 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 301 transitions. [2022-01-31 18:16:58,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 301 transitions. [2022-01-31 18:16:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 18:16:58,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:58,969 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:58,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 18:16:58,969 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:58,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:58,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1013501174, now seen corresponding path program 70 times [2022-01-31 18:16:58,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:58,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566816246] [2022-01-31 18:16:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:58,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:58,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:58,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:58,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:00,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:00,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:00,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566816246] [2022-01-31 18:17:00,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566816246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:00,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:00,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:17:00,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744957231] [2022-01-31 18:17:00,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:00,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:17:00,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:00,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:17:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:17:00,768 INFO L87 Difference]: Start difference. First operand 229 states and 301 transitions. Second operand has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 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 18:17:11,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:11,525 INFO L93 Difference]: Finished difference Result 601 states and 819 transitions. [2022-01-31 18:17:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:17:11,525 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 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 224 [2022-01-31 18:17:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:11,534 INFO L225 Difference]: With dead ends: 601 [2022-01-31 18:17:11,534 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 18:17:11,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:17:11,539 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1787 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1788 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:11,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1788 Valid, 44 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:17:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 18:17:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 232. [2022-01-31 18:17:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.3274336283185841) internal successors, (300), 226 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 305 transitions. [2022-01-31 18:17:11,716 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 305 transitions. Word has length 224 [2022-01-31 18:17:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:11,716 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 305 transitions. [2022-01-31 18:17:11,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 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 18:17:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 305 transitions. [2022-01-31 18:17:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 18:17:11,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:11,717 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:11,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 18:17:11,717 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:11,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1122062601, now seen corresponding path program 71 times [2022-01-31 18:17:11,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:11,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805448850] [2022-01-31 18:17:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:11,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:11,719 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:11,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:11,724 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:13,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:13,095 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:13,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805448850] [2022-01-31 18:17:13,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1805448850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:13,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:13,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:17:13,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980640480] [2022-01-31 18:17:13,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:13,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:17:13,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:13,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:17:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:17:13,097 INFO L87 Difference]: Start difference. First operand 232 states and 305 transitions. Second operand has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:23,575 INFO L93 Difference]: Finished difference Result 609 states and 830 transitions. [2022-01-31 18:17:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:17:23,575 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 18:17:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:23,577 INFO L225 Difference]: With dead ends: 609 [2022-01-31 18:17:23,577 INFO L226 Difference]: Without dead ends: 597 [2022-01-31 18:17:23,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:17:23,578 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1703 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:23,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 54 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:17:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-31 18:17:23,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 235. [2022-01-31 18:17:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 229 states have (on average 1.3275109170305677) internal successors, (304), 229 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 309 transitions. [2022-01-31 18:17:23,745 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 309 transitions. Word has length 227 [2022-01-31 18:17:23,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:23,745 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 309 transitions. [2022-01-31 18:17:23,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 309 transitions. [2022-01-31 18:17:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 18:17:23,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:23,746 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:23,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:17:23,746 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1165160470, now seen corresponding path program 72 times [2022-01-31 18:17:23,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:23,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43899656] [2022-01-31 18:17:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:23,748 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:23,748 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:23,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:23,754 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:25,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:25,556 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:25,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43899656] [2022-01-31 18:17:25,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [43899656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:25,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:25,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:17:25,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622127993] [2022-01-31 18:17:25,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:25,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:17:25,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:25,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:17:25,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:17:25,559 INFO L87 Difference]: Start difference. First operand 235 states and 309 transitions. Second operand has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 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 18:17:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:38,393 INFO L93 Difference]: Finished difference Result 617 states and 841 transitions. [2022-01-31 18:17:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:17:38,393 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 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 230 [2022-01-31 18:17:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:38,395 INFO L225 Difference]: With dead ends: 617 [2022-01-31 18:17:38,395 INFO L226 Difference]: Without dead ends: 605 [2022-01-31 18:17:38,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:17:38,397 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1910 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1911 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 890 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:38,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1911 Valid, 39 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [890 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:17:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-31 18:17:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 238. [2022-01-31 18:17:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.3275862068965518) internal successors, (308), 232 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 313 transitions. [2022-01-31 18:17:38,645 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 313 transitions. Word has length 230 [2022-01-31 18:17:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:38,645 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 313 transitions. [2022-01-31 18:17:38,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 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 18:17:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 313 transitions. [2022-01-31 18:17:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 18:17:38,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:38,646 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:38,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:17:38,647 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:38,647 INFO L85 PathProgramCache]: Analyzing trace with hash -898554345, now seen corresponding path program 73 times [2022-01-31 18:17:38,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:38,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811758979] [2022-01-31 18:17:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:38,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:38,649 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:38,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:38,656 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:40,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:40,746 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 18:17:40,747 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:40,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811758979] [2022-01-31 18:17:40,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811758979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:40,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:40,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:17:40,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335786834] [2022-01-31 18:17:40,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:40,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:17:40,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:40,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:17:40,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:17:40,749 INFO L87 Difference]: Start difference. First operand 238 states and 313 transitions. Second operand has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:54,734 INFO L93 Difference]: Finished difference Result 625 states and 852 transitions. [2022-01-31 18:17:54,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:17:54,735 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-01-31 18:17:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:54,741 INFO L225 Difference]: With dead ends: 625 [2022-01-31 18:17:54,741 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 18:17:54,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:17:54,742 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2013 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 941 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2014 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 941 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:54,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2014 Valid, 44 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [941 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:17:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 18:17:54,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 241. [2022-01-31 18:17:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 235 states have (on average 1.327659574468085) internal successors, (312), 235 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 317 transitions. [2022-01-31 18:17:54,998 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 317 transitions. Word has length 233 [2022-01-31 18:17:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:54,999 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 317 transitions. [2022-01-31 18:17:54,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 317 transitions. [2022-01-31 18:17:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-31 18:17:55,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:55,001 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:55,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:17:55,001 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:55,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:55,002 INFO L85 PathProgramCache]: Analyzing trace with hash 169985226, now seen corresponding path program 74 times [2022-01-31 18:17:55,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:55,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430561650] [2022-01-31 18:17:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:55,004 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:55,004 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:55,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:55,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:56,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:56,966 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430561650] [2022-01-31 18:17:56,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1430561650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:56,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:56,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:17:56,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011876026] [2022-01-31 18:17:56,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:56,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:17:56,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:17:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:17:56,968 INFO L87 Difference]: Start difference. First operand 241 states and 317 transitions. Second operand has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 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 18:18:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:11,478 INFO L93 Difference]: Finished difference Result 633 states and 863 transitions. [2022-01-31 18:18:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:18:11,479 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 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 236 [2022-01-31 18:18:11,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:11,480 INFO L225 Difference]: With dead ends: 633 [2022-01-31 18:18:11,480 INFO L226 Difference]: Without dead ends: 621 [2022-01-31 18:18:11,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:18:11,482 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1815 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1816 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:11,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1816 Valid, 34 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [844 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:18:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-31 18:18:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 244. [2022-01-31 18:18:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.3277310924369747) internal successors, (316), 238 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:11,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 321 transitions. [2022-01-31 18:18:11,670 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 321 transitions. Word has length 236 [2022-01-31 18:18:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:11,671 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 321 transitions. [2022-01-31 18:18:11,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 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 18:18:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 321 transitions. [2022-01-31 18:18:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 18:18:11,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:11,672 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:11,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:18:11,672 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1265253065, now seen corresponding path program 75 times [2022-01-31 18:18:11,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117594322] [2022-01-31 18:18:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:11,674 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:11,674 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:11,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:11,679 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:13,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:13,286 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:13,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117594322] [2022-01-31 18:18:13,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [117594322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:13,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:13,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:18:13,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28794068] [2022-01-31 18:18:13,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:13,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:18:13,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:18:13,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:18:13,289 INFO L87 Difference]: Start difference. First operand 244 states and 321 transitions. Second operand has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:26,377 INFO L93 Difference]: Finished difference Result 641 states and 874 transitions. [2022-01-31 18:18:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:18:26,378 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 18:18:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:26,379 INFO L225 Difference]: With dead ends: 641 [2022-01-31 18:18:26,379 INFO L226 Difference]: Without dead ends: 629 [2022-01-31 18:18:26,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:18:26,381 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1900 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 889 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:26,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1901 Valid, 44 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [889 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-31 18:18:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 247. [2022-01-31 18:18:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 241 states have (on average 1.3278008298755186) internal successors, (320), 241 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 325 transitions. [2022-01-31 18:18:26,573 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 325 transitions. Word has length 239 [2022-01-31 18:18:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:26,574 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 325 transitions. [2022-01-31 18:18:26,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 325 transitions. [2022-01-31 18:18:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 18:18:26,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:26,574 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:26,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:18:26,575 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2049748566, now seen corresponding path program 76 times [2022-01-31 18:18:26,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:26,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408705869] [2022-01-31 18:18:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:26,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:26,577 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:26,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:26,583 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:28,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:28,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408705869] [2022-01-31 18:18:28,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1408705869] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:28,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:28,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:18:28,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049673876] [2022-01-31 18:18:28,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:28,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:18:28,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:28,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:18:28,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:18:28,448 INFO L87 Difference]: Start difference. First operand 247 states and 325 transitions. Second operand has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 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 18:18:40,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:40,652 INFO L93 Difference]: Finished difference Result 649 states and 885 transitions. [2022-01-31 18:18:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:18:40,652 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 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 242 [2022-01-31 18:18:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:40,653 INFO L225 Difference]: With dead ends: 649 [2022-01-31 18:18:40,653 INFO L226 Difference]: Without dead ends: 637 [2022-01-31 18:18:40,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:18:40,655 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2046 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2047 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 950 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:40,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2047 Valid, 44 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [950 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:18:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-31 18:18:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 250. [2022-01-31 18:18:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 244 states have (on average 1.3278688524590163) internal successors, (324), 244 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 329 transitions. [2022-01-31 18:18:40,864 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 329 transitions. Word has length 242 [2022-01-31 18:18:40,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:40,864 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 329 transitions. [2022-01-31 18:18:40,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 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 18:18:40,864 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 329 transitions. [2022-01-31 18:18:40,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 18:18:40,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:40,865 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:40,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:18:40,865 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash 256805975, now seen corresponding path program 77 times [2022-01-31 18:18:40,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:40,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155657535] [2022-01-31 18:18:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:40,867 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:40,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:40,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:40,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:42,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:42,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:42,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155657535] [2022-01-31 18:18:42,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [155657535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:42,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:42,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:18:42,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771292007] [2022-01-31 18:18:42,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:42,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:18:42,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:42,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:18:42,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:18:42,838 INFO L87 Difference]: Start difference. First operand 250 states and 329 transitions. Second operand has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:55,478 INFO L93 Difference]: Finished difference Result 657 states and 896 transitions. [2022-01-31 18:18:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:18:55,478 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-01-31 18:18:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:55,480 INFO L225 Difference]: With dead ends: 657 [2022-01-31 18:18:55,480 INFO L226 Difference]: Without dead ends: 645 [2022-01-31 18:18:55,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:18:55,481 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1861 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:55,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1862 Valid, 54 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:18:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-31 18:18:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 253. [2022-01-31 18:18:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 247 states have (on average 1.3279352226720649) internal successors, (328), 247 states have internal predecessors, (328), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 333 transitions. [2022-01-31 18:18:55,688 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 333 transitions. Word has length 245 [2022-01-31 18:18:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:55,689 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 333 transitions. [2022-01-31 18:18:55,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 333 transitions. [2022-01-31 18:18:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-31 18:18:55,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:55,689 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:55,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:18:55,690 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:55,690 INFO L85 PathProgramCache]: Analyzing trace with hash -358631798, now seen corresponding path program 78 times [2022-01-31 18:18:55,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:55,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292513796] [2022-01-31 18:18:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:55,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:55,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:55,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:55,698 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:57,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:57,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:57,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292513796] [2022-01-31 18:18:57,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [292513796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:57,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:57,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:18:57,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242463206] [2022-01-31 18:18:57,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:57,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:18:57,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:57,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:18:57,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:18:57,611 INFO L87 Difference]: Start difference. First operand 253 states and 333 transitions. Second operand has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 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 18:19:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:10,720 INFO L93 Difference]: Finished difference Result 665 states and 907 transitions. [2022-01-31 18:19:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:19:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 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 248 [2022-01-31 18:19:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:10,722 INFO L225 Difference]: With dead ends: 665 [2022-01-31 18:19:10,722 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 18:19:10,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 18:19:10,723 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2133 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:10,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2133 Valid, 44 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [993 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:19:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 18:19:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 256. [2022-01-31 18:19:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.328) internal successors, (332), 250 states have internal predecessors, (332), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 337 transitions. [2022-01-31 18:19:10,934 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 337 transitions. Word has length 248 [2022-01-31 18:19:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:10,934 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 337 transitions. [2022-01-31 18:19:10,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 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 18:19:10,934 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 337 transitions. [2022-01-31 18:19:10,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 18:19:10,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:10,935 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:10,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:19:10,935 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash 350059383, now seen corresponding path program 79 times [2022-01-31 18:19:10,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:10,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729036642] [2022-01-31 18:19:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:10,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:10,937 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:10,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:10,944 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:12,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:12,525 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:12,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729036642] [2022-01-31 18:19:12,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [729036642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:12,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:12,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:19:12,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314476786] [2022-01-31 18:19:12,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:12,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:19:12,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:19:12,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:19:12,527 INFO L87 Difference]: Start difference. First operand 256 states and 337 transitions. Second operand has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:26,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:26,101 INFO L93 Difference]: Finished difference Result 673 states and 918 transitions. [2022-01-31 18:19:26,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:19:26,101 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 18:19:26,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:26,103 INFO L225 Difference]: With dead ends: 673 [2022-01-31 18:19:26,103 INFO L226 Difference]: Without dead ends: 661 [2022-01-31 18:19:26,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 18:19:26,104 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2123 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 987 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2124 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 987 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:26,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2124 Valid, 44 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [987 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:19:26,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-31 18:19:26,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 259. [2022-01-31 18:19:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 253 states have (on average 1.3280632411067195) internal successors, (336), 253 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 341 transitions. [2022-01-31 18:19:26,311 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 341 transitions. Word has length 251 [2022-01-31 18:19:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:26,311 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 341 transitions. [2022-01-31 18:19:26,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:26,311 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 341 transitions. [2022-01-31 18:19:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 18:19:26,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:26,312 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:26,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:19:26,312 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:26,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:26,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1090194582, now seen corresponding path program 80 times [2022-01-31 18:19:26,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:26,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145656570] [2022-01-31 18:19:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:26,314 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:26,314 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:26,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:26,321 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:28,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:28,498 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:28,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145656570] [2022-01-31 18:19:28,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145656570] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:28,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:28,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:19:28,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060452987] [2022-01-31 18:19:28,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:28,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:19:28,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:28,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:19:28,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:19:28,500 INFO L87 Difference]: Start difference. First operand 259 states and 341 transitions. Second operand has 84 states, 84 states have (on average 2.9761904761904763) internal successors, (250), 83 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 18:19:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:42,728 INFO L93 Difference]: Finished difference Result 681 states and 929 transitions. [2022-01-31 18:19:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:19:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.9761904761904763) internal successors, (250), 83 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 254 [2022-01-31 18:19:42,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:42,730 INFO L225 Difference]: With dead ends: 681 [2022-01-31 18:19:42,730 INFO L226 Difference]: Without dead ends: 669 [2022-01-31 18:19:42,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 18:19:42,731 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1843 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:42,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1844 Valid, 49 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:19:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-31 18:19:42,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 262. [2022-01-31 18:19:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 256 states have (on average 1.328125) internal successors, (340), 256 states have internal predecessors, (340), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 345 transitions. [2022-01-31 18:19:42,946 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 345 transitions. Word has length 254 [2022-01-31 18:19:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:42,946 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 345 transitions. [2022-01-31 18:19:42,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.9761904761904763) internal successors, (250), 83 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 18:19:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 345 transitions. [2022-01-31 18:19:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 18:19:42,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:42,947 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:42,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:19:42,947 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:42,948 INFO L85 PathProgramCache]: Analyzing trace with hash -972778857, now seen corresponding path program 81 times [2022-01-31 18:19:42,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:42,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704545123] [2022-01-31 18:19:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:42,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:42,949 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:42,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:42,956 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:44,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:44,766 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 18:19:44,766 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:44,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704545123] [2022-01-31 18:19:44,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [704545123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:44,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:44,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:19:44,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558184531] [2022-01-31 18:19:44,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:44,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:19:44,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:44,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:19:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:19:44,769 INFO L87 Difference]: Start difference. First operand 262 states and 345 transitions. Second operand has 85 states, 85 states have (on average 2.976470588235294) internal successors, (253), 84 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:59,065 INFO L93 Difference]: Finished difference Result 689 states and 940 transitions. [2022-01-31 18:19:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:19:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.976470588235294) internal successors, (253), 84 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-01-31 18:19:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:59,066 INFO L225 Difference]: With dead ends: 689 [2022-01-31 18:19:59,066 INFO L226 Difference]: Without dead ends: 677 [2022-01-31 18:19:59,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 18:19:59,068 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2344 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2345 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:59,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2345 Valid, 49 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:19:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-31 18:19:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 265. [2022-01-31 18:19:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 259 states have (on average 1.3281853281853282) internal successors, (344), 259 states have internal predecessors, (344), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 349 transitions. [2022-01-31 18:19:59,290 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 349 transitions. Word has length 257 [2022-01-31 18:19:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:59,290 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 349 transitions. [2022-01-31 18:19:59,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.976470588235294) internal successors, (253), 84 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 349 transitions. [2022-01-31 18:19:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-31 18:19:59,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:59,291 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:59,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:19:59,291 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash 855705674, now seen corresponding path program 82 times [2022-01-31 18:19:59,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:59,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162944177] [2022-01-31 18:19:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:59,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:59,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:59,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:59,310 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:01,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:01,626 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:01,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162944177] [2022-01-31 18:20:01,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [162944177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:01,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:01,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:20:01,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133548520] [2022-01-31 18:20:01,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:01,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:20:01,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:01,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:20:01,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:20:01,628 INFO L87 Difference]: Start difference. First operand 265 states and 349 transitions. Second operand has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 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 18:20:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:17,484 INFO L93 Difference]: Finished difference Result 697 states and 951 transitions. [2022-01-31 18:20:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:20:17,484 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 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 260 [2022-01-31 18:20:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:17,485 INFO L225 Difference]: With dead ends: 697 [2022-01-31 18:20:17,485 INFO L226 Difference]: Without dead ends: 685 [2022-01-31 18:20:17,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 18:20:17,487 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2164 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 1017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2165 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1017 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:17,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2165 Valid, 34 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1017 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:20:17,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-31 18:20:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 268. [2022-01-31 18:20:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.3282442748091603) internal successors, (348), 262 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 353 transitions. [2022-01-31 18:20:17,722 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 353 transitions. Word has length 260 [2022-01-31 18:20:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:17,722 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 353 transitions. [2022-01-31 18:20:17,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 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 18:20:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 353 transitions. [2022-01-31 18:20:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 18:20:17,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:17,723 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:17,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:20:17,723 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:17,723 INFO L85 PathProgramCache]: Analyzing trace with hash 168153527, now seen corresponding path program 83 times [2022-01-31 18:20:17,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:17,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749438025] [2022-01-31 18:20:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:17,725 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:17,725 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:20:17,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:17,732 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:19,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:19,868 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:19,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749438025] [2022-01-31 18:20:19,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749438025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:19,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:19,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:20:19,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085791532] [2022-01-31 18:20:19,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:19,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:20:19,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:20:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:20:19,870 INFO L87 Difference]: Start difference. First operand 268 states and 353 transitions. Second operand has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 86 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:36,197 INFO L93 Difference]: Finished difference Result 705 states and 962 transitions. [2022-01-31 18:20:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:20:36,198 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 86 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 18:20:36,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:36,201 INFO L225 Difference]: With dead ends: 705 [2022-01-31 18:20:36,201 INFO L226 Difference]: Without dead ends: 693 [2022-01-31 18:20:36,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 18:20:36,202 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2138 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 1000 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1000 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:36,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2139 Valid, 49 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1000 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:20:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-01-31 18:20:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 271. [2022-01-31 18:20:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 265 states have (on average 1.3283018867924528) internal successors, (352), 265 states have internal predecessors, (352), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 357 transitions. [2022-01-31 18:20:36,439 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 357 transitions. Word has length 263 [2022-01-31 18:20:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:36,440 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 357 transitions. [2022-01-31 18:20:36,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 86 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 357 transitions. [2022-01-31 18:20:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-31 18:20:36,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:36,441 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:36,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:20:36,442 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:36,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:36,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1176874, now seen corresponding path program 84 times [2022-01-31 18:20:36,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:36,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563936577] [2022-01-31 18:20:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:36,445 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:36,445 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:20:36,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:36,457 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:38,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:38,643 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:38,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563936577] [2022-01-31 18:20:38,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563936577] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:38,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:38,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:20:38,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323104] [2022-01-31 18:20:38,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:38,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:20:38,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:20:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:20:38,646 INFO L87 Difference]: Start difference. First operand 271 states and 357 transitions. Second operand has 88 states, 88 states have (on average 2.977272727272727) internal successors, (262), 87 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 18:20:55,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:55,128 INFO L93 Difference]: Finished difference Result 713 states and 973 transitions. [2022-01-31 18:20:55,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:20:55,128 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.977272727272727) internal successors, (262), 87 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 266 [2022-01-31 18:20:55,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:55,130 INFO L225 Difference]: With dead ends: 713 [2022-01-31 18:20:55,130 INFO L226 Difference]: Without dead ends: 701 [2022-01-31 18:20:55,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 18:20:55,131 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2320 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 1084 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2321 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1084 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:55,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2321 Valid, 59 Invalid, 2413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1084 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:20:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-31 18:20:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 274. [2022-01-31 18:20:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 268 states have (on average 1.328358208955224) internal successors, (356), 268 states have internal predecessors, (356), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 361 transitions. [2022-01-31 18:20:55,383 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 361 transitions. Word has length 266 [2022-01-31 18:20:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:55,383 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 361 transitions. [2022-01-31 18:20:55,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.977272727272727) internal successors, (262), 87 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 18:20:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 361 transitions. [2022-01-31 18:20:55,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-31 18:20:55,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:55,384 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:55,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:20:55,384 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:55,384 INFO L85 PathProgramCache]: Analyzing trace with hash -828163881, now seen corresponding path program 85 times [2022-01-31 18:20:55,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:55,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922074235] [2022-01-31 18:20:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:55,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:55,386 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:20:55,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:55,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:57,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:57,707 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 18:20:57,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:57,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922074235] [2022-01-31 18:20:57,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [922074235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:57,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:57,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:20:57,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750466589] [2022-01-31 18:20:57,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:57,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:20:57,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:57,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:20:57,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:20:57,710 INFO L87 Difference]: Start difference. First operand 274 states and 361 transitions. Second operand has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:15,216 INFO L93 Difference]: Finished difference Result 721 states and 984 transitions. [2022-01-31 18:21:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:21:15,216 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-01-31 18:21:15,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:15,218 INFO L225 Difference]: With dead ends: 721 [2022-01-31 18:21:15,218 INFO L226 Difference]: Without dead ends: 709 [2022-01-31 18:21:15,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 18:21:15,220 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2010 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 934 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 934 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:15,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2011 Valid, 54 Invalid, 2421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [934 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:21:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-31 18:21:15,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 277. [2022-01-31 18:21:15,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 271 states have (on average 1.3284132841328413) internal successors, (360), 271 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 365 transitions. [2022-01-31 18:21:15,473 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 365 transitions. Word has length 269 [2022-01-31 18:21:15,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:15,473 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 365 transitions. [2022-01-31 18:21:15,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:15,474 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 365 transitions. [2022-01-31 18:21:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-31 18:21:15,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:15,474 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:15,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:21:15,475 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:15,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1228257802, now seen corresponding path program 86 times [2022-01-31 18:21:15,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:15,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302846513] [2022-01-31 18:21:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:15,476 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:15,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:15,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:15,484 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:18,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:18,010 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:18,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302846513] [2022-01-31 18:21:18,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [302846513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:18,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:18,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:21:18,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879929600] [2022-01-31 18:21:18,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:18,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:21:18,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:18,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:21:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:21:18,013 INFO L87 Difference]: Start difference. First operand 277 states and 365 transitions. Second operand has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 89 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 18:21:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:36,580 INFO L93 Difference]: Finished difference Result 729 states and 995 transitions. [2022-01-31 18:21:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:21:36,581 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 89 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 272 [2022-01-31 18:21:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:36,582 INFO L225 Difference]: With dead ends: 729 [2022-01-31 18:21:36,582 INFO L226 Difference]: Without dead ends: 717 [2022-01-31 18:21:36,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 18:21:36,583 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2199 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 1021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2200 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1021 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:36,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2200 Valid, 44 Invalid, 2293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1021 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:21:36,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-31 18:21:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 280. [2022-01-31 18:21:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.3284671532846715) internal successors, (364), 274 states have internal predecessors, (364), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 369 transitions. [2022-01-31 18:21:36,859 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 369 transitions. Word has length 272 [2022-01-31 18:21:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:36,860 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 369 transitions. [2022-01-31 18:21:36,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 89 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 18:21:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 369 transitions. [2022-01-31 18:21:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 18:21:36,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:36,861 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:36,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:21:36,861 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:36,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:36,861 INFO L85 PathProgramCache]: Analyzing trace with hash 673105911, now seen corresponding path program 87 times [2022-01-31 18:21:36,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:36,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970960748] [2022-01-31 18:21:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:36,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:36,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:36,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:36,870 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:39,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:39,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:39,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970960748] [2022-01-31 18:21:39,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1970960748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:39,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:39,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:21:39,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795558865] [2022-01-31 18:21:39,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:39,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:21:39,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:39,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:21:39,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:21:39,154 INFO L87 Difference]: Start difference. First operand 280 states and 369 transitions. Second operand has 91 states, 91 states have (on average 2.978021978021978) internal successors, (271), 90 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:58,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:58,132 INFO L93 Difference]: Finished difference Result 737 states and 1006 transitions. [2022-01-31 18:21:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:21:58,132 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.978021978021978) internal successors, (271), 90 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 18:21:58,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:58,133 INFO L225 Difference]: With dead ends: 737 [2022-01-31 18:21:58,133 INFO L226 Difference]: Without dead ends: 725 [2022-01-31 18:21:58,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 18:21:58,135 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2453 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 1142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2454 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1142 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:58,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2454 Valid, 49 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1142 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:21:58,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-31 18:21:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 283. [2022-01-31 18:21:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 277 states have (on average 1.3285198555956679) internal successors, (368), 277 states have internal predecessors, (368), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 373 transitions. [2022-01-31 18:21:58,402 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 373 transitions. Word has length 275 [2022-01-31 18:21:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:58,403 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 373 transitions. [2022-01-31 18:21:58,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.978021978021978) internal successors, (271), 90 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 373 transitions. [2022-01-31 18:21:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 18:21:58,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:58,404 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:58,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:21:58,404 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:58,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2062178026, now seen corresponding path program 88 times [2022-01-31 18:21:58,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:58,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138068080] [2022-01-31 18:21:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:58,407 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:58,407 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:58,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:58,414 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:00,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:00,842 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:00,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138068080] [2022-01-31 18:22:00,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [138068080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:00,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:00,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:22:00,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551567659] [2022-01-31 18:22:00,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:00,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:22:00,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:22:00,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:22:00,845 INFO L87 Difference]: Start difference. First operand 283 states and 373 transitions. Second operand has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 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 18:22:20,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:20,902 INFO L93 Difference]: Finished difference Result 745 states and 1017 transitions. [2022-01-31 18:22:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:22:20,902 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 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 278 [2022-01-31 18:22:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:20,904 INFO L225 Difference]: With dead ends: 745 [2022-01-31 18:22:20,904 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 18:22:20,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 18:22:20,907 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2188 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2189 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:20,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2189 Valid, 59 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:22:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 18:22:21,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 286. [2022-01-31 18:22:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.3285714285714285) internal successors, (372), 280 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 377 transitions. [2022-01-31 18:22:21,181 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 377 transitions. Word has length 278 [2022-01-31 18:22:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:21,181 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 377 transitions. [2022-01-31 18:22:21,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 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 18:22:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 377 transitions. [2022-01-31 18:22:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 18:22:21,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:21,182 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:21,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:22:21,182 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:21,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:21,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1899659031, now seen corresponding path program 89 times [2022-01-31 18:22:21,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:21,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838090006] [2022-01-31 18:22:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:21,184 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:21,184 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:21,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:21,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:23,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:23,351 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:23,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838090006] [2022-01-31 18:22:23,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [838090006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:23,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:23,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:22:23,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663856293] [2022-01-31 18:22:23,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:23,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:22:23,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:23,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:22:23,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:22:23,353 INFO L87 Difference]: Start difference. First operand 286 states and 377 transitions. Second operand has 93 states, 93 states have (on average 2.978494623655914) internal successors, (277), 92 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:43,522 INFO L93 Difference]: Finished difference Result 753 states and 1028 transitions. [2022-01-31 18:22:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:22:43,522 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.978494623655914) internal successors, (277), 92 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-01-31 18:22:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:43,523 INFO L225 Difference]: With dead ends: 753 [2022-01-31 18:22:43,523 INFO L226 Difference]: Without dead ends: 741 [2022-01-31 18:22:43,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 18:22:43,525 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2264 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 1056 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2265 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1056 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:43,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2265 Valid, 44 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1056 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:22:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-01-31 18:22:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 289. [2022-01-31 18:22:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 283 states have (on average 1.3286219081272084) internal successors, (376), 283 states have internal predecessors, (376), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 381 transitions. [2022-01-31 18:22:43,800 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 381 transitions. Word has length 281 [2022-01-31 18:22:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:43,800 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 381 transitions. [2022-01-31 18:22:43,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.978494623655914) internal successors, (277), 92 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 381 transitions. [2022-01-31 18:22:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-01-31 18:22:43,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:43,801 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:43,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:22:43,801 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:43,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:43,801 INFO L85 PathProgramCache]: Analyzing trace with hash 724421578, now seen corresponding path program 90 times [2022-01-31 18:22:43,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:43,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861488051] [2022-01-31 18:22:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:43,803 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:43,803 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:43,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:43,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:45,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:45,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:45,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861488051] [2022-01-31 18:22:45,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861488051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:45,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:45,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:22:45,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101269854] [2022-01-31 18:22:45,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:45,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:22:45,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:45,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:22:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:22:45,655 INFO L87 Difference]: Start difference. First operand 289 states and 381 transitions. Second operand has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 93 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 18:23:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:05,904 INFO L93 Difference]: Finished difference Result 761 states and 1039 transitions. [2022-01-31 18:23:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:23:05,905 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 93 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 284 [2022-01-31 18:23:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:05,906 INFO L225 Difference]: With dead ends: 761 [2022-01-31 18:23:05,906 INFO L226 Difference]: Without dead ends: 749 [2022-01-31 18:23:05,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 18:23:05,908 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2394 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 1121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2395 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1121 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:05,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2395 Valid, 44 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1121 Valid, 1454 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:23:05,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-31 18:23:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 292. [2022-01-31 18:23:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.3286713286713288) internal successors, (380), 286 states have internal predecessors, (380), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 385 transitions. [2022-01-31 18:23:06,202 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 385 transitions. Word has length 284 [2022-01-31 18:23:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:06,202 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 385 transitions. [2022-01-31 18:23:06,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 93 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 18:23:06,203 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 385 transitions. [2022-01-31 18:23:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 18:23:06,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:06,204 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:06,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:23:06,204 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1798856247, now seen corresponding path program 91 times [2022-01-31 18:23:06,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:06,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592234717] [2022-01-31 18:23:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:06,206 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:06,206 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:06,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:06,216 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:08,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:08,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:08,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592234717] [2022-01-31 18:23:08,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592234717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:08,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:08,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:23:08,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515265029] [2022-01-31 18:23:08,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:08,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:23:08,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:23:08,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:23:08,613 INFO L87 Difference]: Start difference. First operand 292 states and 385 transitions. Second operand has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:30,354 INFO L93 Difference]: Finished difference Result 769 states and 1050 transitions. [2022-01-31 18:23:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:23:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 18:23:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:30,356 INFO L225 Difference]: With dead ends: 769 [2022-01-31 18:23:30,356 INFO L226 Difference]: Without dead ends: 757 [2022-01-31 18:23:30,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 18:23:30,357 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2260 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 1054 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2261 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1054 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:30,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2261 Valid, 39 Invalid, 2413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1054 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:23:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-31 18:23:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 295. [2022-01-31 18:23:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.328719723183391) internal successors, (384), 289 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 389 transitions. [2022-01-31 18:23:30,681 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 389 transitions. Word has length 287 [2022-01-31 18:23:30,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:30,681 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 389 transitions. [2022-01-31 18:23:30,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 389 transitions. [2022-01-31 18:23:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 18:23:30,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:30,682 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:30,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:23:30,682 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:30,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:30,683 INFO L85 PathProgramCache]: Analyzing trace with hash -109176662, now seen corresponding path program 92 times [2022-01-31 18:23:30,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:30,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459640266] [2022-01-31 18:23:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:30,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:30,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:30,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:30,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:33,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:33,402 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 18:23:33,402 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:33,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459640266] [2022-01-31 18:23:33,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1459640266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:33,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:33,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:23:33,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305251735] [2022-01-31 18:23:33,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:33,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:23:33,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:23:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:23:33,405 INFO L87 Difference]: Start difference. First operand 295 states and 389 transitions. Second operand has 96 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 95 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 18:23:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:55,981 INFO L93 Difference]: Finished difference Result 777 states and 1061 transitions. [2022-01-31 18:23:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:23:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 95 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 290 [2022-01-31 18:23:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:55,982 INFO L225 Difference]: With dead ends: 777 [2022-01-31 18:23:55,982 INFO L226 Difference]: Without dead ends: 765 [2022-01-31 18:23:55,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 18:23:55,984 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2334 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 1088 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2335 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1088 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:55,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2335 Valid, 34 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1088 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:23:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-31 18:23:56,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 298. [2022-01-31 18:23:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 292 states have (on average 1.3287671232876712) internal successors, (388), 292 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 393 transitions. [2022-01-31 18:23:56,283 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 393 transitions. Word has length 290 [2022-01-31 18:23:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:56,283 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 393 transitions. [2022-01-31 18:23:56,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 95 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 18:23:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 393 transitions. [2022-01-31 18:23:56,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-31 18:23:56,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:56,284 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:56,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:23:56,284 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1574593879, now seen corresponding path program 93 times [2022-01-31 18:23:56,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409693300] [2022-01-31 18:23:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:56,295 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:56,296 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:56,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:56,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:58,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:58,962 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:58,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409693300] [2022-01-31 18:23:58,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [409693300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:58,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:58,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:23:58,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110583254] [2022-01-31 18:23:58,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:58,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:23:58,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:58,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:23:58,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:23:58,966 INFO L87 Difference]: Start difference. First operand 298 states and 393 transitions. Second operand has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:22,098 INFO L93 Difference]: Finished difference Result 785 states and 1072 transitions. [2022-01-31 18:24:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:24:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 293 [2022-01-31 18:24:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:22,100 INFO L225 Difference]: With dead ends: 785 [2022-01-31 18:24:22,100 INFO L226 Difference]: Without dead ends: 773 [2022-01-31 18:24:22,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 18:24:22,101 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2764 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 1296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2765 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1296 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:22,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2765 Valid, 49 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1296 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:24:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-31 18:24:22,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 301. [2022-01-31 18:24:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 295 states have (on average 1.3288135593220338) internal successors, (392), 295 states have internal predecessors, (392), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:22,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 397 transitions. [2022-01-31 18:24:22,407 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 397 transitions. Word has length 293 [2022-01-31 18:24:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:22,407 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 397 transitions. [2022-01-31 18:24:22,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 397 transitions. [2022-01-31 18:24:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-01-31 18:24:22,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:22,408 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:22,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:24:22,408 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:22,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1859730826, now seen corresponding path program 94 times [2022-01-31 18:24:22,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:22,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117581906] [2022-01-31 18:24:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:22,410 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:22,410 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:22,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:22,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:25,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:25,163 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:25,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117581906] [2022-01-31 18:24:25,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117581906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:25,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:25,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:24:25,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197546431] [2022-01-31 18:24:25,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:25,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:24:25,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:25,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:24:25,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:24:25,166 INFO L87 Difference]: Start difference. First operand 301 states and 397 transitions. Second operand has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:49,109 INFO L93 Difference]: Finished difference Result 793 states and 1083 transitions. [2022-01-31 18:24:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:24:49,110 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 296 [2022-01-31 18:24:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:49,112 INFO L225 Difference]: With dead ends: 793 [2022-01-31 18:24:49,112 INFO L226 Difference]: Without dead ends: 781 [2022-01-31 18:24:49,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 18:24:49,114 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2240 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 1041 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2241 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1041 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:49,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2241 Valid, 49 Invalid, 2526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1041 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:24:49,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-01-31 18:24:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 304. [2022-01-31 18:24:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.3288590604026846) internal successors, (396), 298 states have internal predecessors, (396), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 401 transitions. [2022-01-31 18:24:49,428 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 401 transitions. Word has length 296 [2022-01-31 18:24:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:49,428 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 401 transitions. [2022-01-31 18:24:49,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 401 transitions. [2022-01-31 18:24:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 18:24:49,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:49,429 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:49,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:24:49,430 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash 929207415, now seen corresponding path program 95 times [2022-01-31 18:24:49,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:49,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791057202] [2022-01-31 18:24:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:49,432 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:49,432 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:49,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:49,441 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:51,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:51,648 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 18:24:51,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:51,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791057202] [2022-01-31 18:24:51,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791057202] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:51,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:51,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:24:51,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607985237] [2022-01-31 18:24:51,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:51,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:24:51,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:51,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:24:51,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:24:51,651 INFO L87 Difference]: Start difference. First operand 304 states and 401 transitions. Second operand has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 98 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:16,669 INFO L93 Difference]: Finished difference Result 801 states and 1094 transitions. [2022-01-31 18:25:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:25:16,669 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 98 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 18:25:16,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:16,684 INFO L225 Difference]: With dead ends: 801 [2022-01-31 18:25:16,684 INFO L226 Difference]: Without dead ends: 789 [2022-01-31 18:25:16,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 18:25:16,686 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2401 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 1118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1118 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:16,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2402 Valid, 44 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1118 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:25:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-31 18:25:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 307. [2022-01-31 18:25:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 301 states have (on average 1.3289036544850499) internal successors, (400), 301 states have internal predecessors, (400), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 405 transitions. [2022-01-31 18:25:17,067 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 405 transitions. Word has length 299 [2022-01-31 18:25:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:17,067 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 405 transitions. [2022-01-31 18:25:17,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 98 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 405 transitions. [2022-01-31 18:25:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-01-31 18:25:17,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:17,068 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:17,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:25:17,069 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:17,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash -574801302, now seen corresponding path program 96 times [2022-01-31 18:25:17,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:17,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300555618] [2022-01-31 18:25:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:17,071 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:17,071 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:17,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:17,082 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:19,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:19,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:19,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300555618] [2022-01-31 18:25:19,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1300555618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:19,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:19,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:25:19,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208405789] [2022-01-31 18:25:19,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:19,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:25:19,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:19,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:25:19,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:25:19,892 INFO L87 Difference]: Start difference. First operand 307 states and 405 transitions. Second operand has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:45,252 INFO L93 Difference]: Finished difference Result 809 states and 1105 transitions. [2022-01-31 18:25:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:25:45,252 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2022-01-31 18:25:45,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:45,253 INFO L225 Difference]: With dead ends: 809 [2022-01-31 18:25:45,253 INFO L226 Difference]: Without dead ends: 797 [2022-01-31 18:25:45,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 18:25:45,255 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2361 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2362 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1098 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:45,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2362 Valid, 64 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:25:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-31 18:25:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 310. [2022-01-31 18:25:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 304 states have (on average 1.3289473684210527) internal successors, (404), 304 states have internal predecessors, (404), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 409 transitions. [2022-01-31 18:25:45,587 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 409 transitions. Word has length 302 [2022-01-31 18:25:45,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:45,588 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 409 transitions. [2022-01-31 18:25:45,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 409 transitions. [2022-01-31 18:25:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 18:25:45,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:45,589 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:45,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:25:45,589 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:45,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1399657577, now seen corresponding path program 97 times [2022-01-31 18:25:45,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:45,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857812521] [2022-01-31 18:25:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:45,591 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:45,591 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:45,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:45,600 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:48,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:48,420 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 18:25:48,420 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857812521] [2022-01-31 18:25:48,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857812521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:48,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:48,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:25:48,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032992901] [2022-01-31 18:25:48,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:48,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:25:48,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:48,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:25:48,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:25:48,423 INFO L87 Difference]: Start difference. First operand 310 states and 409 transitions. Second operand has 101 states, 101 states have (on average 2.98019801980198) internal successors, (301), 100 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:14,663 INFO L93 Difference]: Finished difference Result 817 states and 1116 transitions. [2022-01-31 18:26:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:26:14,663 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.98019801980198) internal successors, (301), 100 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 305 [2022-01-31 18:26:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:14,671 INFO L225 Difference]: With dead ends: 817 [2022-01-31 18:26:14,671 INFO L226 Difference]: Without dead ends: 805 [2022-01-31 18:26:14,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 18:26:14,673 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2658 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 1243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2659 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1243 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:14,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2659 Valid, 44 Invalid, 2680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1243 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:26:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-31 18:26:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 313. [2022-01-31 18:26:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 307 states have (on average 1.3289902280130292) internal successors, (408), 307 states have internal predecessors, (408), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:15,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 413 transitions. [2022-01-31 18:26:15,011 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 413 transitions. Word has length 305 [2022-01-31 18:26:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:15,012 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 413 transitions. [2022-01-31 18:26:15,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.98019801980198) internal successors, (301), 100 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:15,012 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 413 transitions. [2022-01-31 18:26:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-01-31 18:26:15,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:15,013 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:15,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:26:15,013 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:15,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1109921610, now seen corresponding path program 98 times [2022-01-31 18:26:15,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:15,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191171533] [2022-01-31 18:26:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:15,015 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:15,015 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:15,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:15,031 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:17,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:17,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:17,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191171533] [2022-01-31 18:26:17,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [191171533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:17,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:17,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:26:17,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006001692] [2022-01-31 18:26:17,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:17,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:26:17,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:26:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:26:17,894 INFO L87 Difference]: Start difference. First operand 313 states and 413 transitions. Second operand has 102 states, 102 states have (on average 2.980392156862745) internal successors, (304), 101 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:44,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:44,981 INFO L93 Difference]: Finished difference Result 825 states and 1127 transitions. [2022-01-31 18:26:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:26:44,982 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.980392156862745) internal successors, (304), 101 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 308 [2022-01-31 18:26:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:44,983 INFO L225 Difference]: With dead ends: 825 [2022-01-31 18:26:44,983 INFO L226 Difference]: Without dead ends: 813 [2022-01-31 18:26:44,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 18:26:44,985 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2874 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 1342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2875 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1342 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:44,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2875 Valid, 39 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1342 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:26:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-31 18:26:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 316. [2022-01-31 18:26:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.3290322580645162) internal successors, (412), 310 states have internal predecessors, (412), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 417 transitions. [2022-01-31 18:26:45,342 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 417 transitions. Word has length 308 [2022-01-31 18:26:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:45,342 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 417 transitions. [2022-01-31 18:26:45,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.980392156862745) internal successors, (304), 101 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 417 transitions. [2022-01-31 18:26:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 18:26:45,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:45,344 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:45,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:26:45,344 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1487760055, now seen corresponding path program 99 times [2022-01-31 18:26:45,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:45,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093462635] [2022-01-31 18:26:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:45,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:45,346 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:45,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:45,356 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat