/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/openssl-simplified/s3_srvr_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 02:45:19,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 02:45:19,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 02:45:19,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 02:45:19,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 02:45:19,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 02:45:19,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 02:45:19,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 02:45:19,857 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 02:45:19,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 02:45:19,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 02:45:19,858 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 02:45:19,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 02:45:19,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 02:45:19,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 02:45:19,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 02:45:19,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 02:45:19,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 02:45:19,859 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 02:45:19,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 02:45:19,860 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 02:45:19,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 02:45:19,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 02:45:19,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 02:45:19,860 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 02:45:19,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 02:45:19,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:45:19,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 02:45:19,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 02:45:19,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 02:45:19,861 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 02:45:19,862 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 02:45:20,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 02:45:20,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 02:45:20,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 02:45:20,153 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 02:45:20,156 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 02:45:20,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c [2022-02-15 02:45:20,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abec2df7b/c5a16fb7749f47d6bdb3f6451b3c84c5/FLAGa8f588f54 [2022-02-15 02:45:20,611 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 02:45:20,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c [2022-02-15 02:45:20,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abec2df7b/c5a16fb7749f47d6bdb3f6451b3c84c5/FLAGa8f588f54 [2022-02-15 02:45:21,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abec2df7b/c5a16fb7749f47d6bdb3f6451b3c84c5 [2022-02-15 02:45:21,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 02:45:21,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 02:45:21,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 02:45:21,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 02:45:21,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 02:45:21,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:45:21" (1/1) ... [2022-02-15 02:45:21,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70df1598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:45:21, skipping insertion in model container [2022-02-15 02:45:21,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:45:21" (1/1) ... [2022-02-15 02:45:21,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 02:45:21,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 02:45:21,314 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c[43387,43400] [2022-02-15 02:45:21,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:45:21,336 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 02:45:21,393 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c[43387,43400] [2022-02-15 02:45:21,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:45:21,404 INFO L208 MainTranslator]: Completed translation [2022-02-15 02:45:21,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:45:21 WrapperNode [2022-02-15 02:45:21,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 02:45:21,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 02:45:21,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 02:45:21,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 02:45:21,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:45:21" (1/1) ... [2022-02-15 02:45:21,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:45:21" (1/1) ... [2022-02-15 02:45:21,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:45:21" (1/1) ... [2022-02-15 02:45:21,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:45:21" (1/1) ... [2022-02-15 02:45:21,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:45:21" (1/1) ... [2022-02-15 02:45:21,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:45:21" (1/1) ... [2022-02-15 02:45:21,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:45:21" (1/1) ... [2022-02-15 02:45:21,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 02:45:21,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 02:45:21,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 02:45:21,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 02:45:21,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:45:21" (1/1) ... [2022-02-15 02:45:21,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:45:21,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 02:45:21,513 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) [2022-02-15 02:45:21,538 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 [2022-02-15 02:45:21,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 02:45:21,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 02:45:21,556 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 02:45:21,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2022-02-15 02:45:21,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR [2022-02-15 02:45:21,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 02:45:21,557 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 02:45:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 02:45:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 02:45:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 02:45:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 02:45:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 02:45:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-15 02:45:21,559 INFO L130 BoogieDeclarations]: Found specification of procedure ERR [2022-02-15 02:45:21,559 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2022-02-15 02:45:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 02:45:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 02:45:21,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 02:45:21,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 02:45:21,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 02:45:21,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 02:45:21,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 02:45:21,678 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 02:45:21,684 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 02:45:21,785 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:45:22,131 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-02-15 02:45:22,131 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-02-15 02:45:22,143 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 02:45:22,149 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 02:45:22,149 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 02:45:22,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:45:22 BoogieIcfgContainer [2022-02-15 02:45:22,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 02:45:22,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 02:45:22,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 02:45:22,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 02:45:22,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:45:21" (1/3) ... [2022-02-15 02:45:22,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ffbd64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:45:22, skipping insertion in model container [2022-02-15 02:45:22,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:45:21" (2/3) ... [2022-02-15 02:45:22,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ffbd64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:45:22, skipping insertion in model container [2022-02-15 02:45:22,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:45:22" (3/3) ... [2022-02-15 02:45:22,163 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_1.cil-2.c [2022-02-15 02:45:22,168 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 02:45:22,168 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 02:45:22,214 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 02:45:22,222 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 [2022-02-15 02:45:22,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 02:45:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 145 states have (on average 1.696551724137931) internal successors, (246), 147 states have internal predecessors, (246), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 02:45:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:45:22,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:22,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:22,258 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:22,264 INFO L85 PathProgramCache]: Analyzing trace with hash -360564499, now seen corresponding path program 1 times [2022-02-15 02:45:22,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:22,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255105879] [2022-02-15 02:45:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:22,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:22,328 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:45:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:22,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:22,514 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:22,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255105879] [2022-02-15 02:45:22,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [255105879] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:22,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:22,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 02:45:22,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055062787] [2022-02-15 02:45:22,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:22,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 02:45:22,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:22,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 02:45:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 02:45:22,545 INFO L87 Difference]: Start difference. First operand has 155 states, 145 states have (on average 1.696551724137931) internal successors, (246), 147 states have internal predecessors, (246), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:23,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:23,023 INFO L93 Difference]: Finished difference Result 424 states and 712 transitions. [2022-02-15 02:45:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 02:45:23,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 02:45:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:23,041 INFO L225 Difference]: With dead ends: 424 [2022-02-15 02:45:23,042 INFO L226 Difference]: Without dead ends: 256 [2022-02-15 02:45:23,045 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 [2022-02-15 02:45:23,048 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 637 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:23,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 251 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:45:23,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-15 02:45:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-02-15 02:45:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.52) internal successors, (380), 250 states have internal predecessors, (380), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 385 transitions. [2022-02-15 02:45:23,139 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 385 transitions. Word has length 52 [2022-02-15 02:45:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:23,140 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 385 transitions. [2022-02-15 02:45:23,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 385 transitions. [2022-02-15 02:45:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 02:45:23,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:23,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:23,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 02:45:23,154 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:23,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:23,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1193418840, now seen corresponding path program 1 times [2022-02-15 02:45:23,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:23,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972353343] [2022-02-15 02:45:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:24,165 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:24,167 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:45:24,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:24,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:25,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:25,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972353343] [2022-02-15 02:45:25,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1972353343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:25,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:25,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 02:45:25,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035572160] [2022-02-15 02:45:25,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:25,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 02:45:25,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:25,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 02:45:25,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:45:25,278 INFO L87 Difference]: Start difference. First operand 256 states and 385 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:26,351 INFO L93 Difference]: Finished difference Result 709 states and 1101 transitions. [2022-02-15 02:45:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:45:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 02:45:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:26,355 INFO L225 Difference]: With dead ends: 709 [2022-02-15 02:45:26,355 INFO L226 Difference]: Without dead ends: 431 [2022-02-15 02:45:26,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:45:26,358 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 937 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 479 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:26,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 206 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 912 Invalid, 0 Unknown, 479 Unchecked, 0.7s Time] [2022-02-15 02:45:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-15 02:45:26,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 369. [2022-02-15 02:45:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 363 states have (on average 1.4517906336088153) internal successors, (527), 363 states have internal predecessors, (527), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 532 transitions. [2022-02-15 02:45:26,396 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 532 transitions. Word has length 68 [2022-02-15 02:45:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:26,397 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 532 transitions. [2022-02-15 02:45:26,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 532 transitions. [2022-02-15 02:45:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 02:45:26,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:26,400 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:26,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 02:45:26,400 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:26,401 INFO L85 PathProgramCache]: Analyzing trace with hash 436825771, now seen corresponding path program 1 times [2022-02-15 02:45:26,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:26,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697754358] [2022-02-15 02:45:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:26,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:26,994 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:26,994 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:27,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:27,078 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:27,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:27,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:27,578 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:27,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697754358] [2022-02-15 02:45:27,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697754358] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:27,579 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:27,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:45:27,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676208686] [2022-02-15 02:45:27,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:27,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:45:27,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:45:27,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:45:27,581 INFO L87 Difference]: Start difference. First operand 369 states and 532 transitions. Second operand has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:29,212 INFO L93 Difference]: Finished difference Result 668 states and 941 transitions. [2022-02-15 02:45:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:45:29,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 02:45:29,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:29,215 INFO L225 Difference]: With dead ends: 668 [2022-02-15 02:45:29,215 INFO L226 Difference]: Without dead ends: 471 [2022-02-15 02:45:29,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:45:29,218 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 873 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:29,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 245 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:45:29,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-02-15 02:45:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 388. [2022-02-15 02:45:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 382 states have (on average 1.4293193717277486) internal successors, (546), 382 states have internal predecessors, (546), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 551 transitions. [2022-02-15 02:45:29,249 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 551 transitions. Word has length 89 [2022-02-15 02:45:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:29,249 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 551 transitions. [2022-02-15 02:45:29,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:29,250 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 551 transitions. [2022-02-15 02:45:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 02:45:29,251 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:29,251 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:29,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 02:45:29,252 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1612562071, now seen corresponding path program 1 times [2022-02-15 02:45:29,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:29,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159561661] [2022-02-15 02:45:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:29,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:29,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:29,848 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:29,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:29,930 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:29,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:30,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:30,459 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:30,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159561661] [2022-02-15 02:45:30,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [159561661] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:30,460 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:30,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:45:30,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052801612] [2022-02-15 02:45:30,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:30,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:45:30,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:45:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:45:30,462 INFO L87 Difference]: Start difference. First operand 388 states and 551 transitions. Second operand has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:31,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:31,655 INFO L93 Difference]: Finished difference Result 687 states and 954 transitions. [2022-02-15 02:45:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:45:31,655 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 02:45:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:31,657 INFO L225 Difference]: With dead ends: 687 [2022-02-15 02:45:31,657 INFO L226 Difference]: Without dead ends: 452 [2022-02-15 02:45:31,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:45:31,660 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 945 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:31,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 220 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:45:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-02-15 02:45:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 369. [2022-02-15 02:45:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 363 states have (on average 1.4490358126721763) internal successors, (526), 363 states have internal predecessors, (526), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 531 transitions. [2022-02-15 02:45:31,686 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 531 transitions. Word has length 89 [2022-02-15 02:45:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:31,686 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 531 transitions. [2022-02-15 02:45:31,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 531 transitions. [2022-02-15 02:45:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-15 02:45:31,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:31,688 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:31,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 02:45:31,688 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:31,689 INFO L85 PathProgramCache]: Analyzing trace with hash 3998338, now seen corresponding path program 1 times [2022-02-15 02:45:31,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:31,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670819505] [2022-02-15 02:45:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:32,172 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:32,246 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:32,247 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:32,324 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:32,324 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:32,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:32,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:32,563 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:32,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670819505] [2022-02-15 02:45:32,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670819505] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:32,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:32,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:45:32,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511486487] [2022-02-15 02:45:32,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:32,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:45:32,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:45:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:45:32,566 INFO L87 Difference]: Start difference. First operand 369 states and 531 transitions. Second operand has 16 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:33,414 INFO L93 Difference]: Finished difference Result 901 states and 1313 transitions. [2022-02-15 02:45:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:45:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-02-15 02:45:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:33,417 INFO L225 Difference]: With dead ends: 901 [2022-02-15 02:45:33,417 INFO L226 Difference]: Without dead ends: 540 [2022-02-15 02:45:33,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=598, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:45:33,419 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 822 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:33,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 218 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:45:33,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-02-15 02:45:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 475. [2022-02-15 02:45:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 469 states have (on average 1.396588486140725) internal successors, (655), 469 states have internal predecessors, (655), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 660 transitions. [2022-02-15 02:45:33,452 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 660 transitions. Word has length 90 [2022-02-15 02:45:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:33,452 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 660 transitions. [2022-02-15 02:45:33,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 660 transitions. [2022-02-15 02:45:33,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 02:45:33,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:33,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:33,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 02:45:33,454 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1808873363, now seen corresponding path program 1 times [2022-02-15 02:45:33,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:33,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871742644] [2022-02-15 02:45:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:33,950 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:34,018 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:34,018 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:34,097 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:34,098 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:34,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:34,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:35,078 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:35,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871742644] [2022-02-15 02:45:35,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [871742644] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:35,078 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:35,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:45:35,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858868213] [2022-02-15 02:45:35,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:35,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:45:35,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:35,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:45:35,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:45:35,080 INFO L87 Difference]: Start difference. First operand 475 states and 660 transitions. Second operand has 25 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:36,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:36,371 INFO L93 Difference]: Finished difference Result 1110 states and 1583 transitions. [2022-02-15 02:45:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:45:36,371 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 02:45:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:36,376 INFO L225 Difference]: With dead ends: 1110 [2022-02-15 02:45:36,376 INFO L226 Difference]: Without dead ends: 625 [2022-02-15 02:45:36,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=292, Invalid=1514, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:45:36,381 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 372 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:36,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 262 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1751 Invalid, 0 Unknown, 513 Unchecked, 0.9s Time] [2022-02-15 02:45:36,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-02-15 02:45:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 563. [2022-02-15 02:45:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 557 states have (on average 1.4039497307001796) internal successors, (782), 557 states have internal predecessors, (782), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:36,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 787 transitions. [2022-02-15 02:45:36,426 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 787 transitions. Word has length 92 [2022-02-15 02:45:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:36,427 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 787 transitions. [2022-02-15 02:45:36,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 787 transitions. [2022-02-15 02:45:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 02:45:36,430 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:36,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:36,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 02:45:36,431 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:36,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1846437857, now seen corresponding path program 1 times [2022-02-15 02:45:36,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:36,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249218547] [2022-02-15 02:45:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:36,506 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:37,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:37,006 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:37,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=3, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:37,116 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:37,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:37,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:37,710 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:37,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249218547] [2022-02-15 02:45:37,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [249218547] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:37,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:37,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 02:45:37,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181978131] [2022-02-15 02:45:37,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:37,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 02:45:37,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 02:45:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:45:37,712 INFO L87 Difference]: Start difference. First operand 563 states and 787 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:39,190 INFO L93 Difference]: Finished difference Result 1491 states and 2070 transitions. [2022-02-15 02:45:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:45:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-02-15 02:45:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:39,195 INFO L225 Difference]: With dead ends: 1491 [2022-02-15 02:45:39,195 INFO L226 Difference]: Without dead ends: 984 [2022-02-15 02:45:39,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=420, Invalid=1560, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:45:39,197 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 1178 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2188 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:39,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 196 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2188 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:45:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-02-15 02:45:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 589. [2022-02-15 02:45:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 583 states have (on average 1.3927958833619212) internal successors, (812), 583 states have internal predecessors, (812), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 817 transitions. [2022-02-15 02:45:39,257 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 817 transitions. Word has length 101 [2022-02-15 02:45:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:39,258 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 817 transitions. [2022-02-15 02:45:39,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 817 transitions. [2022-02-15 02:45:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-15 02:45:39,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:39,260 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:39,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 02:45:39,260 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:39,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:39,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1432757828, now seen corresponding path program 1 times [2022-02-15 02:45:39,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:39,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845895577] [2022-02-15 02:45:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:39,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 5 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=3, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:39,403 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:39,819 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:39,819 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:39,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:39,963 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 5 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=3, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:39,964 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:39,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:40,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:40,674 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:40,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845895577] [2022-02-15 02:45:40,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [845895577] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:40,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:40,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 02:45:40,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712452434] [2022-02-15 02:45:40,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:40,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 02:45:40,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:40,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 02:45:40,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:45:40,677 INFO L87 Difference]: Start difference. First operand 589 states and 817 transitions. Second operand has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:42,435 INFO L93 Difference]: Finished difference Result 1227 states and 1689 transitions. [2022-02-15 02:45:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:45:42,437 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-02-15 02:45:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:42,439 INFO L225 Difference]: With dead ends: 1227 [2022-02-15 02:45:42,440 INFO L226 Difference]: Without dead ends: 694 [2022-02-15 02:45:42,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=2297, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 02:45:42,442 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1277 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:42,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 199 Invalid, 3002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2943 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:45:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-02-15 02:45:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 597. [2022-02-15 02:45:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 591 states have (on average 1.38917089678511) internal successors, (821), 591 states have internal predecessors, (821), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 826 transitions. [2022-02-15 02:45:42,505 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 826 transitions. Word has length 114 [2022-02-15 02:45:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:42,505 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 826 transitions. [2022-02-15 02:45:42,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 826 transitions. [2022-02-15 02:45:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-15 02:45:42,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:42,508 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:42,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 02:45:42,508 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:42,509 INFO L85 PathProgramCache]: Analyzing trace with hash 610054600, now seen corresponding path program 1 times [2022-02-15 02:45:42,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:42,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373508157] [2022-02-15 02:45:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:42,514 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:45:42,514 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:45:42,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:42,515 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:45:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:42,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:42,573 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:42,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373508157] [2022-02-15 02:45:42,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [373508157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:42,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:42,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 02:45:42,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892496519] [2022-02-15 02:45:42,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:42,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 02:45:42,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:42,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 02:45:42,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 02:45:42,575 INFO L87 Difference]: Start difference. First operand 597 states and 826 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:42,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:42,835 INFO L93 Difference]: Finished difference Result 1598 states and 2218 transitions. [2022-02-15 02:45:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 02:45:42,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-02-15 02:45:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:42,844 INFO L225 Difference]: With dead ends: 1598 [2022-02-15 02:45:42,844 INFO L226 Difference]: Without dead ends: 1057 [2022-02-15 02:45:42,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:45:42,847 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 372 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:42,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 375 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:45:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-02-15 02:45:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1050. [2022-02-15 02:45:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1044 states have (on average 1.3764367816091954) internal successors, (1437), 1044 states have internal predecessors, (1437), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1442 transitions. [2022-02-15 02:45:42,973 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1442 transitions. Word has length 114 [2022-02-15 02:45:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:42,973 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1442 transitions. [2022-02-15 02:45:42,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1442 transitions. [2022-02-15 02:45:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-15 02:45:42,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:42,976 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:42,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 02:45:42,976 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash 380427612, now seen corresponding path program 1 times [2022-02-15 02:45:42,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:42,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287364320] [2022-02-15 02:45:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:42,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:45:42,982 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:45:42,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:42,983 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:45:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:43,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:43,026 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:43,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287364320] [2022-02-15 02:45:43,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [287364320] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:43,026 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:43,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 02:45:43,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3206081] [2022-02-15 02:45:43,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:43,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 02:45:43,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 02:45:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 02:45:43,030 INFO L87 Difference]: Start difference. First operand 1050 states and 1442 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:43,136 INFO L93 Difference]: Finished difference Result 1609 states and 2209 transitions. [2022-02-15 02:45:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 02:45:43,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-02-15 02:45:43,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:43,140 INFO L225 Difference]: With dead ends: 1609 [2022-02-15 02:45:43,140 INFO L226 Difference]: Without dead ends: 1068 [2022-02-15 02:45:43,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:45:43,141 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 370 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:43,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 214 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:45:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-02-15 02:45:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1013. [2022-02-15 02:45:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1007 states have (on average 1.374379344587885) internal successors, (1384), 1007 states have internal predecessors, (1384), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1389 transitions. [2022-02-15 02:45:43,237 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1389 transitions. Word has length 116 [2022-02-15 02:45:43,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:43,237 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1389 transitions. [2022-02-15 02:45:43,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:43,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1389 transitions. [2022-02-15 02:45:43,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-15 02:45:43,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:43,240 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:43,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 02:45:43,241 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:43,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:43,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1241926765, now seen corresponding path program 1 times [2022-02-15 02:45:43,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:43,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585818645] [2022-02-15 02:45:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:43,732 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:43,780 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 5 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=3, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:43,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:43,858 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:43,920 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 5 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=3, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:43,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:43,992 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:44,075 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:44,075 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:44,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:44,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:45,293 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:45,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585818645] [2022-02-15 02:45:45,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585818645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:45,293 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:45,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:45:45,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201397702] [2022-02-15 02:45:45,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:45,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:45:45,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:45,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:45:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:45:45,295 INFO L87 Difference]: Start difference. First operand 1013 states and 1389 transitions. Second operand has 29 states, 28 states have (on average 4.0) internal successors, (112), 27 states have internal predecessors, (112), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:47,435 INFO L93 Difference]: Finished difference Result 2420 states and 3383 transitions. [2022-02-15 02:45:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:45:47,436 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.0) internal successors, (112), 27 states have internal predecessors, (112), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-02-15 02:45:47,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:47,441 INFO L225 Difference]: With dead ends: 2420 [2022-02-15 02:45:47,441 INFO L226 Difference]: Without dead ends: 1415 [2022-02-15 02:45:47,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=417, Invalid=2553, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 02:45:47,444 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 973 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3403 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 4231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 3403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 716 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:47,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 266 Invalid, 4231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 3403 Invalid, 0 Unknown, 716 Unchecked, 1.4s Time] [2022-02-15 02:45:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-02-15 02:45:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1120. [2022-02-15 02:45:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1114 states have (on average 1.3913824057450628) internal successors, (1550), 1114 states have internal predecessors, (1550), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1555 transitions. [2022-02-15 02:45:47,565 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1555 transitions. Word has length 117 [2022-02-15 02:45:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:47,565 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1555 transitions. [2022-02-15 02:45:47,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.0) internal successors, (112), 27 states have internal predecessors, (112), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:47,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1555 transitions. [2022-02-15 02:45:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-15 02:45:47,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:47,568 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:47,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 02:45:47,568 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash 644746976, now seen corresponding path program 1 times [2022-02-15 02:45:47,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:47,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402746585] [2022-02-15 02:45:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:47,636 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:48,050 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:48,135 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:48,135 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:48,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:48,331 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:48,332 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:48,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:48,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:49,115 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:49,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402746585] [2022-02-15 02:45:49,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [402746585] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:49,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:49,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:45:49,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392018046] [2022-02-15 02:45:49,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:49,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:45:49,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:49,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:45:49,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:45:49,118 INFO L87 Difference]: Start difference. First operand 1120 states and 1555 transitions. Second operand has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:51,439 INFO L93 Difference]: Finished difference Result 4497 states and 6250 transitions. [2022-02-15 02:45:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:45:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-02-15 02:45:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:51,454 INFO L225 Difference]: With dead ends: 4497 [2022-02-15 02:45:51,455 INFO L226 Difference]: Without dead ends: 3391 [2022-02-15 02:45:51,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 02:45:51,460 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1627 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3729 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1627 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 3795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 3729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:51,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1627 Valid, 214 Invalid, 3795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 3729 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:45:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2022-02-15 02:45:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 3165. [2022-02-15 02:45:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 3159 states have (on average 1.3963279518835074) internal successors, (4411), 3159 states have internal predecessors, (4411), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 4416 transitions. [2022-02-15 02:45:51,798 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 4416 transitions. Word has length 127 [2022-02-15 02:45:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:51,798 INFO L470 AbstractCegarLoop]: Abstraction has 3165 states and 4416 transitions. [2022-02-15 02:45:51,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 4416 transitions. [2022-02-15 02:45:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-15 02:45:51,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:51,822 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:51,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 02:45:51,822 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:51,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash 490502430, now seen corresponding path program 1 times [2022-02-15 02:45:51,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:51,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665563541] [2022-02-15 02:45:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:45:51,886 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:55,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 9 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:55,147 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:55,147 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:55,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:55,330 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:45:55,331 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:45:55,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:45:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:55,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:45:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:45:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:45:56,262 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:45:56,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665563541] [2022-02-15 02:45:56,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1665563541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:45:56,263 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:45:56,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:45:56,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964030549] [2022-02-15 02:45:56,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:45:56,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:45:56,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:45:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:45:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:45:56,264 INFO L87 Difference]: Start difference. First operand 3165 states and 4416 transitions. Second operand has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:45:58,838 INFO L93 Difference]: Finished difference Result 12955 states and 18104 transitions. [2022-02-15 02:45:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:45:58,838 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-02-15 02:45:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:45:58,866 INFO L225 Difference]: With dead ends: 12955 [2022-02-15 02:45:58,866 INFO L226 Difference]: Without dead ends: 9804 [2022-02-15 02:45:58,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=540, Invalid=2430, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 02:45:58,875 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 1536 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2913 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:45:58,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1536 Valid, 196 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2913 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:45:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9804 states. [2022-02-15 02:45:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9804 to 9177. [2022-02-15 02:45:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9171 states have (on average 1.410097045033257) internal successors, (12932), 9171 states have internal predecessors, (12932), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 12937 transitions. [2022-02-15 02:45:59,854 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 12937 transitions. Word has length 128 [2022-02-15 02:45:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:45:59,854 INFO L470 AbstractCegarLoop]: Abstraction has 9177 states and 12937 transitions. [2022-02-15 02:45:59,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:45:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 12937 transitions. [2022-02-15 02:45:59,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-15 02:45:59,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:45:59,865 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:45:59,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 02:45:59,865 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:45:59,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:45:59,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1731516901, now seen corresponding path program 1 times [2022-02-15 02:45:59,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:45:59,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002421027] [2022-02-15 02:45:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:46:31,824 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:46:32,226 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:46:32,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:46:32,314 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:47:03,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:47:03,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:47:03,974 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:47:03,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:47:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:47:04,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:47:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:47:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:47:04,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:47:04,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002421027] [2022-02-15 02:47:04,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2002421027] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:47:04,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:47:04,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:47:04,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032907062] [2022-02-15 02:47:04,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:47:04,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:47:04,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:47:04,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:47:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:47:04,952 INFO L87 Difference]: Start difference. First operand 9177 states and 12937 transitions. Second operand has 30 states, 29 states have (on average 4.586206896551724) internal successors, (133), 28 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:47:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:47:08,736 INFO L93 Difference]: Finished difference Result 20606 states and 28497 transitions. [2022-02-15 02:47:08,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:47:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.586206896551724) internal successors, (133), 28 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-02-15 02:47:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:47:08,770 INFO L225 Difference]: With dead ends: 20606 [2022-02-15 02:47:08,770 INFO L226 Difference]: Without dead ends: 11363 [2022-02-15 02:47:08,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=434, Invalid=2758, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 02:47:08,793 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 924 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4948 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 5037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 4948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:47:08,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 285 Invalid, 5037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 4948 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 02:47:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11363 states. [2022-02-15 02:47:09,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11363 to 9226. [2022-02-15 02:47:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9226 states, 9220 states have (on average 1.4135574837310194) internal successors, (13033), 9220 states have internal predecessors, (13033), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:47:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9226 states to 9226 states and 13038 transitions. [2022-02-15 02:47:09,640 INFO L78 Accepts]: Start accepts. Automaton has 9226 states and 13038 transitions. Word has length 138 [2022-02-15 02:47:09,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:47:09,640 INFO L470 AbstractCegarLoop]: Abstraction has 9226 states and 13038 transitions. [2022-02-15 02:47:09,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.586206896551724) internal successors, (133), 28 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:47:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 9226 states and 13038 transitions. [2022-02-15 02:47:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-15 02:47:09,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:47:09,650 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:47:09,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 02:47:09,650 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:47:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:47:09,651 INFO L85 PathProgramCache]: Analyzing trace with hash 719331811, now seen corresponding path program 1 times [2022-02-15 02:47:09,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:47:09,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340988353] [2022-02-15 02:47:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:47:41,562 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:47:41,636 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:47:42,055 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:47:42,055 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:48:13,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:48:13,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:48:13,747 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:48:13,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:48:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:48:13,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:48:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:48:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:48:14,213 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:48:14,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340988353] [2022-02-15 02:48:14,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340988353] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:48:14,214 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:48:14,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 02:48:14,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399160081] [2022-02-15 02:48:14,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:48:14,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 02:48:14,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:48:14,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 02:48:14,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:48:14,215 INFO L87 Difference]: Start difference. First operand 9226 states and 13038 transitions. Second operand has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 22 states have internal predecessors, (132), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:48:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:48:16,628 INFO L93 Difference]: Finished difference Result 16019 states and 22123 transitions. [2022-02-15 02:48:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:48:16,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 22 states have internal predecessors, (132), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-02-15 02:48:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:48:16,654 INFO L225 Difference]: With dead ends: 16019 [2022-02-15 02:48:16,654 INFO L226 Difference]: Without dead ends: 11043 [2022-02-15 02:48:16,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:48:16,668 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 893 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:48:16,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 230 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:48:16,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2022-02-15 02:48:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 9272. [2022-02-15 02:48:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9272 states, 9266 states have (on average 1.4119361105115475) internal successors, (13083), 9266 states have internal predecessors, (13083), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:48:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9272 states to 9272 states and 13088 transitions. [2022-02-15 02:48:17,530 INFO L78 Accepts]: Start accepts. Automaton has 9272 states and 13088 transitions. Word has length 139 [2022-02-15 02:48:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:48:17,531 INFO L470 AbstractCegarLoop]: Abstraction has 9272 states and 13088 transitions. [2022-02-15 02:48:17,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 22 states have internal predecessors, (132), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:48:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 9272 states and 13088 transitions. [2022-02-15 02:48:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-15 02:48:17,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:48:17,538 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:48:17,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 02:48:17,538 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:48:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:48:17,539 INFO L85 PathProgramCache]: Analyzing trace with hash -254094625, now seen corresponding path program 1 times [2022-02-15 02:48:17,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:48:17,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827417772] [2022-02-15 02:48:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:48:49,404 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:48:52,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 9 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:48:52,499 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:48:52,500 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:48:52,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=5, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:49:24,259 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:49:24,259 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:49:24,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:49:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:49:24,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:49:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:49:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:49:24,968 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:49:24,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827417772] [2022-02-15 02:49:24,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1827417772] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:49:24,968 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:49:24,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:49:24,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417685404] [2022-02-15 02:49:24,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:49:24,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:49:24,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:49:24,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:49:24,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:49:24,970 INFO L87 Difference]: Start difference. First operand 9272 states and 13088 transitions. Second operand has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 23 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:49:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:49:27,622 INFO L93 Difference]: Finished difference Result 16410 states and 22523 transitions. [2022-02-15 02:49:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 02:49:27,623 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 23 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-02-15 02:49:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:49:27,648 INFO L225 Difference]: With dead ends: 16410 [2022-02-15 02:49:27,648 INFO L226 Difference]: Without dead ends: 11388 [2022-02-15 02:49:27,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:49:27,663 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 887 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:49:27,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 235 Invalid, 2409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:49:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11388 states. [2022-02-15 02:49:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11388 to 9318. [2022-02-15 02:49:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9318 states, 9312 states have (on average 1.4101159793814433) internal successors, (13131), 9312 states have internal predecessors, (13131), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:49:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9318 states to 9318 states and 13136 transitions. [2022-02-15 02:49:28,650 INFO L78 Accepts]: Start accepts. Automaton has 9318 states and 13136 transitions. Word has length 139 [2022-02-15 02:49:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:49:28,650 INFO L470 AbstractCegarLoop]: Abstraction has 9318 states and 13136 transitions. [2022-02-15 02:49:28,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 23 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:49:28,650 INFO L276 IsEmpty]: Start isEmpty. Operand 9318 states and 13136 transitions. [2022-02-15 02:49:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-15 02:49:28,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:49:28,660 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:49:28,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 02:49:28,660 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:49:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:49:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1587195881, now seen corresponding path program 1 times [2022-02-15 02:49:28,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:49:28,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595820899] [2022-02-15 02:49:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:50:00,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:50:03,725 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 9 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:50:03,796 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:50:03,796 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:50:35,378 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:50:35,507 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=5, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:50:35,507 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:50:35,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:50:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:50:35,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:50:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:50:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:50:36,229 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:50:36,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595820899] [2022-02-15 02:50:36,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1595820899] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:50:36,229 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:50:36,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 02:50:36,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948890113] [2022-02-15 02:50:36,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:50:36,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 02:50:36,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:50:36,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 02:50:36,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:50:36,230 INFO L87 Difference]: Start difference. First operand 9318 states and 13136 transitions. Second operand has 26 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:50:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:50:39,228 INFO L93 Difference]: Finished difference Result 16480 states and 22594 transitions. [2022-02-15 02:50:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:50:39,229 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-02-15 02:50:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:50:39,247 INFO L225 Difference]: With dead ends: 16480 [2022-02-15 02:50:39,247 INFO L226 Difference]: Without dead ends: 11412 [2022-02-15 02:50:39,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=420, Invalid=1932, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:50:39,259 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 871 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:50:39,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 259 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2991 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:50:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11412 states. [2022-02-15 02:50:40,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11412 to 9319. [2022-02-15 02:50:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9319 states, 9313 states have (on average 1.410071942446043) internal successors, (13132), 9313 states have internal predecessors, (13132), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:50:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9319 states to 9319 states and 13137 transitions. [2022-02-15 02:50:40,179 INFO L78 Accepts]: Start accepts. Automaton has 9319 states and 13137 transitions. Word has length 140 [2022-02-15 02:50:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:50:40,180 INFO L470 AbstractCegarLoop]: Abstraction has 9319 states and 13137 transitions. [2022-02-15 02:50:40,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:50:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 9319 states and 13137 transitions. [2022-02-15 02:50:40,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-15 02:50:40,189 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:50:40,189 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:50:40,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 02:50:40,189 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:50:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:50:40,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1079883807, now seen corresponding path program 2 times [2022-02-15 02:50:40,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:50:40,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294559366] [2022-02-15 02:50:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:51:12,142 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:51:12,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:51:12,634 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:51:12,634 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:51:44,186 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:51:44,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:51:44,287 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:51:44,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:51:44,393 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:51:44,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:51:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:51:44,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:51:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:51:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:51:45,333 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:51:45,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294559366] [2022-02-15 02:51:45,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [294559366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:51:45,334 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:51:45,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 02:51:45,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463805474] [2022-02-15 02:51:45,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:51:45,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:51:45,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:51:45,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:51:45,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:51:45,335 INFO L87 Difference]: Start difference. First operand 9319 states and 13137 transitions. Second operand has 31 states, 30 states have (on average 4.5) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:51:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:51:48,838 INFO L93 Difference]: Finished difference Result 16213 states and 22326 transitions. [2022-02-15 02:51:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:51:48,839 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.5) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-02-15 02:51:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:51:48,857 INFO L225 Difference]: With dead ends: 16213 [2022-02-15 02:51:48,857 INFO L226 Difference]: Without dead ends: 11144 [2022-02-15 02:51:48,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=388, Invalid=3034, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 02:51:48,868 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 825 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3567 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 3635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 3567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:51:48,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 252 Invalid, 3635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3567 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:51:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11144 states. [2022-02-15 02:51:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11144 to 9386. [2022-02-15 02:51:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9386 states, 9380 states have (on average 1.4072494669509594) internal successors, (13200), 9380 states have internal predecessors, (13200), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:51:49,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9386 states to 9386 states and 13205 transitions. [2022-02-15 02:51:49,757 INFO L78 Accepts]: Start accepts. Automaton has 9386 states and 13205 transitions. Word has length 140 [2022-02-15 02:51:49,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:51:49,757 INFO L470 AbstractCegarLoop]: Abstraction has 9386 states and 13205 transitions. [2022-02-15 02:51:49,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.5) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:51:49,758 INFO L276 IsEmpty]: Start isEmpty. Operand 9386 states and 13205 transitions. [2022-02-15 02:51:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-15 02:51:49,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:51:49,767 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:51:49,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 02:51:49,767 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:51:49,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:51:49,767 INFO L85 PathProgramCache]: Analyzing trace with hash -925328543, now seen corresponding path program 2 times [2022-02-15 02:51:49,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:51:49,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889889275] [2022-02-15 02:51:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:51:49,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=5, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:51:49,927 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:52:21,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:52:21,772 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:52:21,772 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:52:21,773 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:52:21,773 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:52:21,773 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:52:21,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=5, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:58:36,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 10 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=10}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:58:36,923 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:58:36,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:58:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:58:36,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:58:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:58:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:58:38,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:58:38,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889889275] [2022-02-15 02:58:38,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [889889275] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:58:38,717 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:58:38,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:58:38,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080240022] [2022-02-15 02:58:38,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:58:38,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:58:38,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:58:38,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:58:38,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:58:38,719 INFO L87 Difference]: Start difference. First operand 9386 states and 13205 transitions. Second operand has 32 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:58:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:58:43,854 INFO L93 Difference]: Finished difference Result 29838 states and 42603 transitions. [2022-02-15 02:58:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:58:43,854 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-02-15 02:58:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:58:43,890 INFO L225 Difference]: With dead ends: 29838 [2022-02-15 02:58:43,890 INFO L226 Difference]: Without dead ends: 20466 [2022-02-15 02:58:43,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 28 SyntacticMatches, 43 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=466, Invalid=3316, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 02:58:43,910 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 1598 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6326 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 6447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 6326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:58:43,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1598 Valid, 296 Invalid, 6447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 6326 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 02:58:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20466 states. [2022-02-15 02:58:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20466 to 10152. [2022-02-15 02:58:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10152 states, 10146 states have (on average 1.4081411393652672) internal successors, (14287), 10146 states have internal predecessors, (14287), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:58:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10152 states to 10152 states and 14292 transitions. [2022-02-15 02:58:45,128 INFO L78 Accepts]: Start accepts. Automaton has 10152 states and 14292 transitions. Word has length 140 [2022-02-15 02:58:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:58:45,128 INFO L470 AbstractCegarLoop]: Abstraction has 10152 states and 14292 transitions. [2022-02-15 02:58:45,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:58:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 10152 states and 14292 transitions. [2022-02-15 02:58:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-02-15 02:58:45,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:58:45,136 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:58:45,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 02:58:45,136 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:58:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:58:45,136 INFO L85 PathProgramCache]: Analyzing trace with hash 432201773, now seen corresponding path program 2 times [2022-02-15 02:58:45,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:58:45,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790800584] [2022-02-15 02:58:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:59:17,011 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:59:20,035 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 9 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:59:20,132 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:59:20,133 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION