/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_1b.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:58:48,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:58:48,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:58:48,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:58:48,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 01:58:48,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 01:58:48,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 01:58:48,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 01:58:48,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 01:58:48,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 01:58:48,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 01:58:48,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 01:58:48,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 01:58:48,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 01:58:48,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 01:58:48,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 01:58:48,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 01:58:48,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:58:48,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:58:48,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:58:48,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:58:48,589 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:58:48,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:58:48,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:58:48,591 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:58:48,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:58:48,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:58:48,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:58:48,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:58:48,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:58:48,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:58:48,592 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:58:48,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:58:48,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:58:48,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:58:48,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:58:48,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:58:48,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:58:48,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:58:48,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:58:48,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:58:48,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:58:48,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:58:48,593 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:58:48,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:58:48,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:58:48,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:58:48,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:58:48,771 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:58:48,773 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:58:48,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/openssl-simplified/s3_srvr_1b.cil.c [2022-02-24 01:58:48,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f9f7259/9a7a9cd342b1490b93bc4cdd788c8fdb/FLAGa58ffef27 [2022-02-24 01:58:49,145 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:58:49,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1b.cil.c [2022-02-24 01:58:49,161 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f9f7259/9a7a9cd342b1490b93bc4cdd788c8fdb/FLAGa58ffef27 [2022-02-24 01:58:49,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f9f7259/9a7a9cd342b1490b93bc4cdd788c8fdb [2022-02-24 01:58:49,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:58:49,178 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:58:49,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:58:49,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:58:49,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:58:49,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:58:49" (1/1) ... [2022-02-24 01:58:49,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d293fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:58:49, skipping insertion in model container [2022-02-24 01:58:49,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:58:49" (1/1) ... [2022-02-24 01:58:49,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:58:49,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:58:49,391 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_1b.cil.c[8244,8257] [2022-02-24 01:58:49,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:58:49,405 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:58:49,424 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_1b.cil.c[8244,8257] [2022-02-24 01:58:49,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:58:49,437 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:58:49,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:58:49 WrapperNode [2022-02-24 01:58:49,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:58:49,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:58:49,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:58:49,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:58:49,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:58:49" (1/1) ... [2022-02-24 01:58:49,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:58:49" (1/1) ... [2022-02-24 01:58:49,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:58:49" (1/1) ... [2022-02-24 01:58:49,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:58:49" (1/1) ... [2022-02-24 01:58:49,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:58:49" (1/1) ... [2022-02-24 01:58:49,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:58:49" (1/1) ... [2022-02-24 01:58:49,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:58:49" (1/1) ... [2022-02-24 01:58:49,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:58:49,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:58:49,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:58:49,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:58:49,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:58:49" (1/1) ... [2022-02-24 01:58:49,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:58:49,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:58:49,490 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) [2022-02-24 01:58:49,508 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 [2022-02-24 01:58:49,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:58:49,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:58:49,524 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:58:49,524 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:58:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:58:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:58:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:58:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:58:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-24 01:58:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:58:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-24 01:58:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:58:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:58:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:58:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:58:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:58:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:58:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:58:49,565 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:58:49,566 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:58:49,711 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:58:49,715 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:58:49,715 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 01:58:49,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:58:49 BoogieIcfgContainer [2022-02-24 01:58:49,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:58:49,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:58:49,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:58:49,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:58:49,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:58:49" (1/3) ... [2022-02-24 01:58:49,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40937c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:58:49, skipping insertion in model container [2022-02-24 01:58:49,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:58:49" (2/3) ... [2022-02-24 01:58:49,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40937c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:58:49, skipping insertion in model container [2022-02-24 01:58:49,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:58:49" (3/3) ... [2022-02-24 01:58:49,721 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2022-02-24 01:58:49,724 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:58:49,724 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:58:49,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:58:49,763 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 [2022-02-24 01:58:49,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:58:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:58:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-02-24 01:58:49,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:49,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:49,775 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:49,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1468663722, now seen corresponding path program 1 times [2022-02-24 01:58:49,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:49,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084849830] [2022-02-24 01:58:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:49,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:49,821 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:49,936 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:49,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084849830] [2022-02-24 01:58:49,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1084849830] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:49,938 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:49,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:58:49,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068837384] [2022-02-24 01:58:49,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:49,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:58:49,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:58:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:58:49,958 INFO L87 Difference]: Start difference. First operand has 29 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:58:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:50,033 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2022-02-24 01:58:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:58:50,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-02-24 01:58:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:50,039 INFO L225 Difference]: With dead ends: 70 [2022-02-24 01:58:50,039 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 01:58:50,041 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 [2022-02-24 01:58:50,044 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 79 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:50,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 44 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:58:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 01:58:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-24 01:58:50,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:58:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-02-24 01:58:50,067 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 9 [2022-02-24 01:58:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:50,067 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-02-24 01:58:50,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:58:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-02-24 01:58:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 01:58:50,068 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:50,068 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:50,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:58:50,069 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:50,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:50,070 INFO L85 PathProgramCache]: Analyzing trace with hash -968056640, now seen corresponding path program 1 times [2022-02-24 01:58:50,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:50,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479045348] [2022-02-24 01:58:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:50,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:50,128 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:50,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:50,183 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 01:58:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:50,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:50,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479045348] [2022-02-24 01:58:50,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479045348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:50,354 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:50,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:58:50,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447477645] [2022-02-24 01:58:50,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:50,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:58:50,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:50,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:58:50,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:58:50,358 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:58:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:50,604 INFO L93 Difference]: Finished difference Result 103 states and 157 transitions. [2022-02-24 01:58:50,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:58:50,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 01:58:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:50,606 INFO L225 Difference]: With dead ends: 103 [2022-02-24 01:58:50,606 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 01:58:50,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:50,608 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:50,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 45 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:58:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 01:58:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2022-02-24 01:58:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.3870967741935485) internal successors, (86), 62 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:58:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2022-02-24 01:58:50,617 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 14 [2022-02-24 01:58:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:50,617 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2022-02-24 01:58:50,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:58:50,618 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2022-02-24 01:58:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 01:58:50,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:50,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:50,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:58:50,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:50,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1603181698, now seen corresponding path program 1 times [2022-02-24 01:58:50,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:50,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649720054] [2022-02-24 01:58:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:50,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:50,648 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:50,657 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:50,657 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 01:58:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:50,724 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:50,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649720054] [2022-02-24 01:58:50,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649720054] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:50,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:50,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:58:50,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188230754] [2022-02-24 01:58:50,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:50,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:58:50,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:58:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:58:50,728 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:58:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:50,918 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2022-02-24 01:58:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:58:50,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-24 01:58:50,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:50,919 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:58:50,919 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 01:58:50,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:50,920 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:50,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 36 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:58:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 01:58:50,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2022-02-24 01:58:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.3214285714285714) internal successors, (111), 84 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:58:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2022-02-24 01:58:50,931 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 21 [2022-02-24 01:58:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:50,932 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2022-02-24 01:58:50,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:58:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2022-02-24 01:58:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 01:58:50,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:50,933 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:50,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:58:50,933 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:50,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1357620209, now seen corresponding path program 1 times [2022-02-24 01:58:50,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:50,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014507375] [2022-02-24 01:58:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:50,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:50,944 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:50,967 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:50,976 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,014 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,040 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,045 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,098 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,099 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 01:58:51,126 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,133 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 01:58:51,155 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,166 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,189 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,218 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,246 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:58:51,246 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 01:58:51,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:58:51,267 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:91) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolantsCraigNested(Interpolator.java:170) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolants(Interpolator.java:126) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:297) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:185) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:216) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms at de.uni_freiburg.informatik.ultimate.logic.NoopScript.annotate(NoopScript.java:471) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.annotate(WrapperScript.java:282) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.annotate(WrapperScript.java:282) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAssertCodeBlocks.annotateAndAssertTerm(AnnotateAndAssertCodeBlocks.java:192) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAssertCodeBlocks.annotateAndAssertNonCall(AnnotateAndAssertCodeBlocks.java:109) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserter.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserter.java:101) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:313) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:211) ... 34 more [2022-02-24 01:58:51,270 INFO L158 Benchmark]: Toolchain (without parser) took 2091.30ms. Allocated memory was 184.5MB in the beginning and 223.3MB in the end (delta: 38.8MB). Free memory was 133.2MB in the beginning and 112.4MB in the end (delta: 20.8MB). Peak memory consumption was 60.5MB. Max. memory is 8.0GB. [2022-02-24 01:58:51,273 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 184.5MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 01:58:51,274 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.30ms. Allocated memory is still 184.5MB. Free memory was 133.0MB in the beginning and 160.4MB in the end (delta: -27.4MB). Peak memory consumption was 15.6MB. Max. memory is 8.0GB. [2022-02-24 01:58:51,274 INFO L158 Benchmark]: Boogie Preprocessor took 29.88ms. Allocated memory is still 184.5MB. Free memory was 160.4MB in the beginning and 158.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 01:58:51,274 INFO L158 Benchmark]: RCFGBuilder took 247.62ms. Allocated memory is still 184.5MB. Free memory was 158.7MB in the beginning and 148.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-24 01:58:51,275 INFO L158 Benchmark]: TraceAbstraction took 1551.94ms. Allocated memory was 184.5MB in the beginning and 223.3MB in the end (delta: 38.8MB). Free memory was 147.5MB in the beginning and 112.4MB in the end (delta: 35.2MB). Peak memory consumption was 73.2MB. Max. memory is 8.0GB. [2022-02-24 01:58:51,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 184.5MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 255.30ms. Allocated memory is still 184.5MB. Free memory was 133.0MB in the beginning and 160.4MB in the end (delta: -27.4MB). Peak memory consumption was 15.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.88ms. Allocated memory is still 184.5MB. Free memory was 160.4MB in the beginning and 158.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 247.62ms. Allocated memory is still 184.5MB. Free memory was 158.7MB in the beginning and 148.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1551.94ms. Allocated memory was 184.5MB in the beginning and 223.3MB in the end (delta: 38.8MB). Free memory was 147.5MB in the beginning and 112.4MB in the end (delta: 35.2MB). Peak memory consumption was 73.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-02-24 01:58:51,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...