/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:36:10,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:36:10,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:36:10,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 02:36:10,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:36:10,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:36:10,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:36:10,661 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:36:10,693 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:36:10,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:36:10,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:36:10,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:36:10,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:36:10,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:36:10,695 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:36:10,695 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:36:10,696 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:36:10,696 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:36:10,696 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:36:10,697 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:36:10,697 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:36:10,697 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:36:10,697 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:36:10,697 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:36:10,697 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:36:10,697 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:36:10,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:36:10,698 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:36:10,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:36:10,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:36:10,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:36:10,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:36:10,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:36:10,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:36:10,699 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:36:10,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:36:10,700 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:36:10,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:36:10,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:36:10,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:36:10,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:36:10,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:36:10,701 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:36:10,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:36:10,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:36:10,701 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:36:10,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:36:10,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:36:10,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:36:10,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:36:10,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:36:10,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:36:10,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:36:10,977 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:36:10,978 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:36:10,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-04-01 02:36:12,098 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:36:12,330 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:36:12,330 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-04-01 02:36:12,336 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae3dd4cef/d43e81b77fe04d51bc72767de49d7d30/FLAGd0f079903 [2023-04-01 02:36:12,352 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae3dd4cef/d43e81b77fe04d51bc72767de49d7d30 [2023-04-01 02:36:12,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:36:12,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:36:12,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:36:12,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:36:12,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:36:12,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:36:12" (1/1) ... [2023-04-01 02:36:12,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5d9342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12, skipping insertion in model container [2023-04-01 02:36:12,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:36:12" (1/1) ... [2023-04-01 02:36:12,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:36:12,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:36:12,505 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2023-04-01 02:36:12,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:36:12,550 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:36:12,564 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2023-04-01 02:36:12,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:36:12,587 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:36:12,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12 WrapperNode [2023-04-01 02:36:12,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:36:12,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:36:12,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:36:12,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:36:12,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12" (1/1) ... [2023-04-01 02:36:12,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12" (1/1) ... [2023-04-01 02:36:12,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12" (1/1) ... [2023-04-01 02:36:12,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12" (1/1) ... [2023-04-01 02:36:12,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12" (1/1) ... [2023-04-01 02:36:12,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12" (1/1) ... [2023-04-01 02:36:12,619 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12" (1/1) ... [2023-04-01 02:36:12,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12" (1/1) ... [2023-04-01 02:36:12,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:36:12,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:36:12,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:36:12,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:36:12,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12" (1/1) ... [2023-04-01 02:36:12,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:36:12,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:12,658 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) [2023-04-01 02:36:12,683 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 [2023-04-01 02:36:12,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:36:12,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:36:12,705 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:36:12,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:36:12,706 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2023-04-01 02:36:12,706 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2023-04-01 02:36:12,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:36:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:36:12,706 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:36:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:36:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:36:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:36:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:36:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:36:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:36:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2023-04-01 02:36:12,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:36:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2023-04-01 02:36:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:36:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:36:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:36:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:36:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:36:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:36:12,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:36:12,799 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:36:12,801 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:36:13,055 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:36:13,098 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:36:13,098 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-04-01 02:36:13,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:36:13 BoogieIcfgContainer [2023-04-01 02:36:13,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:36:13,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:36:13,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:36:13,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:36:13,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:36:12" (1/3) ... [2023-04-01 02:36:13,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3363183b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:36:13, skipping insertion in model container [2023-04-01 02:36:13,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:36:12" (2/3) ... [2023-04-01 02:36:13,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3363183b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:36:13, skipping insertion in model container [2023-04-01 02:36:13,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:36:13" (3/3) ... [2023-04-01 02:36:13,109 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2023-04-01 02:36:13,124 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:36:13,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:36:13,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:36:13,166 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5009b1e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:36:13,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:36:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:36:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 02:36:13,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:13,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:36:13,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:13,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1516028163, now seen corresponding path program 1 times [2023-04-01 02:36:13,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:13,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138557616] [2023-04-01 02:36:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:13,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:36:13,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:13,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138557616] [2023-04-01 02:36:13,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138557616] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:36:13,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:36:13,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:36:13,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835017321] [2023-04-01 02:36:13,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:36:13,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:36:13,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:36:13,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:36:13,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:36:13,522 INFO L87 Difference]: Start difference. First operand has 38 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:36:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:36:13,638 INFO L93 Difference]: Finished difference Result 88 states and 125 transitions. [2023-04-01 02:36:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:36:13,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 02:36:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:36:13,651 INFO L225 Difference]: With dead ends: 88 [2023-04-01 02:36:13,651 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 02:36:13,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:36:13,659 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:36:13,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 58 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:36:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 02:36:13,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2023-04-01 02:36:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:36:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-04-01 02:36:13,700 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 12 [2023-04-01 02:36:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:36:13,701 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-04-01 02:36:13,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:36:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-04-01 02:36:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 02:36:13,703 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:13,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:36:13,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:36:13,704 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:13,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:13,705 INFO L85 PathProgramCache]: Analyzing trace with hash -68675596, now seen corresponding path program 1 times [2023-04-01 02:36:13,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:13,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240435889] [2023-04-01 02:36:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:13,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:36:13,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:13,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240435889] [2023-04-01 02:36:13,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240435889] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:36:13,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777734091] [2023-04-01 02:36:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:13,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:13,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:13,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:36:13,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:36:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:13,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:36:13,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:36:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:36:13,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:36:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:36:13,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777734091] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:36:13,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1712861448] [2023-04-01 02:36:14,008 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:36:14,009 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:36:14,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:36:14,015 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:36:14,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:36:14,135 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:36:14,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:36:14,251 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:36:14,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1712861448] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:36:14,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:36:14,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4, 4] total 13 [2023-04-01 02:36:14,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140449168] [2023-04-01 02:36:14,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:36:14,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:36:14,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:36:14,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:36:14,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-04-01 02:36:14,401 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 8 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:36:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:36:14,929 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2023-04-01 02:36:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 02:36:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 02:36:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:36:14,932 INFO L225 Difference]: With dead ends: 84 [2023-04-01 02:36:14,932 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 02:36:14,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-04-01 02:36:14,933 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 113 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:36:14,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 5 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:36:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 02:36:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-04-01 02:36:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:36:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-04-01 02:36:14,950 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 13 [2023-04-01 02:36:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:36:14,950 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-04-01 02:36:14,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:36:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-04-01 02:36:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 02:36:14,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:14,952 INFO L195 NwaCegarLoop]: 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] [2023-04-01 02:36:14,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:36:15,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:15,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:15,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1059173312, now seen corresponding path program 1 times [2023-04-01 02:36:15,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:15,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997375281] [2023-04-01 02:36:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:15,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:36:15,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:15,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997375281] [2023-04-01 02:36:15,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997375281] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:36:15,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337759192] [2023-04-01 02:36:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:15,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:15,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:15,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:36:15,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:36:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:15,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 02:36:15,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:36:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:36:15,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:36:15,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337759192] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:36:15,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:36:15,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 02:36:15,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587278806] [2023-04-01 02:36:15,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:36:15,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:36:15,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:36:15,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:36:15,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:36:15,375 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 02:36:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:36:15,437 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2023-04-01 02:36:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:36:15,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-04-01 02:36:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:36:15,439 INFO L225 Difference]: With dead ends: 81 [2023-04-01 02:36:15,439 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 02:36:15,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:36:15,442 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:36:15,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:36:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 02:36:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2023-04-01 02:36:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:36:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-04-01 02:36:15,465 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 29 [2023-04-01 02:36:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:36:15,465 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-04-01 02:36:15,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 02:36:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-04-01 02:36:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 02:36:15,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:15,467 INFO L195 NwaCegarLoop]: 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] [2023-04-01 02:36:15,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:36:15,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 02:36:15,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:15,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:15,674 INFO L85 PathProgramCache]: Analyzing trace with hash -427584065, now seen corresponding path program 1 times [2023-04-01 02:36:15,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:15,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526566300] [2023-04-01 02:36:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:15,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:36:15,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:15,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526566300] [2023-04-01 02:36:15,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526566300] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:36:15,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060373827] [2023-04-01 02:36:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:15,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:15,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:15,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:36:15,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:36:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:15,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:36:15,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:36:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:36:15,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:36:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:36:15,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060373827] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:36:15,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [539322099] [2023-04-01 02:36:15,911 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-01 02:36:15,911 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:36:15,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:36:15,913 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:36:15,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:36:15,946 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:36:16,465 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 24 for LOIs [2023-04-01 02:36:16,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:36:16,478 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 24 for LOIs [2023-04-01 02:36:16,522 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:36:17,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [539322099] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:36:17,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:36:17,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [4, 4, 4] total 24 [2023-04-01 02:36:17,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104040659] [2023-04-01 02:36:17,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:36:17,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 02:36:17,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:36:17,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 02:36:17,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-04-01 02:36:17,332 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:36:19,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:36:19,135 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2023-04-01 02:36:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 02:36:19,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-04-01 02:36:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:36:19,137 INFO L225 Difference]: With dead ends: 124 [2023-04-01 02:36:19,137 INFO L226 Difference]: Without dead ends: 95 [2023-04-01 02:36:19,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=386, Invalid=1506, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 02:36:19,138 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 238 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 02:36:19,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 9 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 02:36:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-01 02:36:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 61. [2023-04-01 02:36:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.302325581395349) internal successors, (56), 45 states have internal predecessors, (56), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-01 02:36:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2023-04-01 02:36:19,155 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 30 [2023-04-01 02:36:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:36:19,155 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2023-04-01 02:36:19,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:36:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2023-04-01 02:36:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 02:36:19,156 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:19,157 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 02:36:19,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 02:36:19,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:19,357 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:19,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1006294764, now seen corresponding path program 1 times [2023-04-01 02:36:19,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:19,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64690619] [2023-04-01 02:36:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:19,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:36:19,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:19,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64690619] [2023-04-01 02:36:19,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64690619] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:36:19,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275024570] [2023-04-01 02:36:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:19,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:19,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:19,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:36:19,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:36:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:19,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:36:19,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:36:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:36:19,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:36:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:36:19,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275024570] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:36:19,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487713758] [2023-04-01 02:36:19,540 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 02:36:19,540 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:36:19,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:36:19,540 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:36:19,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:36:19,555 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:36:20,560 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-01 02:36:20,573 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-01 02:36:20,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:36:20,585 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-01 02:36:20,654 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:36:22,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1559#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_35| Int)) (and (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_35|) 0) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_35|) 4)) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_35| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_35|) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_35|))))' at error location [2023-04-01 02:36:22,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:36:22,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:36:22,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:36:22,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493642663] [2023-04-01 02:36:22,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:36:22,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:36:22,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:36:22,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:36:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2023-04-01 02:36:22,285 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:36:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:36:22,365 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2023-04-01 02:36:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:36:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-04-01 02:36:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:36:22,366 INFO L225 Difference]: With dead ends: 134 [2023-04-01 02:36:22,366 INFO L226 Difference]: Without dead ends: 80 [2023-04-01 02:36:22,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2023-04-01 02:36:22,368 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:36:22,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:36:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-01 02:36:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2023-04-01 02:36:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-01 02:36:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2023-04-01 02:36:22,384 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 40 [2023-04-01 02:36:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:36:22,384 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2023-04-01 02:36:22,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:36:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2023-04-01 02:36:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 02:36:22,385 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:22,385 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-04-01 02:36:22,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 02:36:22,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:22,595 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:22,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:22,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2107176067, now seen corresponding path program 2 times [2023-04-01 02:36:22,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:22,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881958139] [2023-04-01 02:36:22,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:22,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:36:22,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:22,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881958139] [2023-04-01 02:36:22,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881958139] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:36:22,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687925817] [2023-04-01 02:36:22,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:36:22,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:22,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:22,669 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:36:22,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:36:22,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:36:22,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:36:22,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:36:22,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:36:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:36:22,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:36:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:36:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687925817] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:36:22,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [898676078] [2023-04-01 02:36:22,775 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 02:36:22,775 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:36:22,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:36:22,775 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:36:22,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:36:22,787 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:36:23,681 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-01 02:36:23,694 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-01 02:36:23,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:36:23,709 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-01 02:36:23,775 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:36:25,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2149#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#set~0.base_BEFORE_CALL_60| Int)) (and (<= 2 |v_main_~#set~0.base_BEFORE_CALL_60|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_60|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_60|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_60|) 0)) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_60| |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:36:25,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:36:25,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:36:25,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:36:25,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494528535] [2023-04-01 02:36:25,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:36:25,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:36:25,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:36:25,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:36:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2023-04-01 02:36:25,324 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:36:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:36:25,390 INFO L93 Difference]: Finished difference Result 165 states and 222 transitions. [2023-04-01 02:36:25,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:36:25,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-04-01 02:36:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:36:25,391 INFO L225 Difference]: With dead ends: 165 [2023-04-01 02:36:25,391 INFO L226 Difference]: Without dead ends: 114 [2023-04-01 02:36:25,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2023-04-01 02:36:25,393 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:36:25,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 90 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:36:25,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-04-01 02:36:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2023-04-01 02:36:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 80 states have internal predecessors, (94), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (27), 18 states have call predecessors, (27), 20 states have call successors, (27) [2023-04-01 02:36:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2023-04-01 02:36:25,419 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 142 transitions. Word has length 43 [2023-04-01 02:36:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:36:25,419 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 142 transitions. [2023-04-01 02:36:25,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:36:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 142 transitions. [2023-04-01 02:36:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 02:36:25,421 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:25,422 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:36:25,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:36:25,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:25,627 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:25,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1247403734, now seen corresponding path program 3 times [2023-04-01 02:36:25,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:25,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300987021] [2023-04-01 02:36:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:25,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 02:36:25,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:25,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300987021] [2023-04-01 02:36:25,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300987021] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:36:25,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527830789] [2023-04-01 02:36:25,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:36:25,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:25,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:25,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:36:25,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:36:25,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:36:25,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:36:25,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 02:36:25,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:36:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-01 02:36:25,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:36:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-01 02:36:25,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527830789] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:36:25,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410897450] [2023-04-01 02:36:26,001 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 02:36:26,001 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:36:26,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:36:26,001 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:36:26,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:36:26,013 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:36:26,882 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-01 02:36:26,894 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-01 02:36:26,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:36:26,905 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-01 02:36:26,954 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:36:28,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2970#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#set~0.base_BEFORE_CALL_85| Int)) (and (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_85| |#StackHeapBarrier|)) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_85|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_85|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_85|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_85|) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:36:28,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:36:28,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:36:28,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 11 [2023-04-01 02:36:28,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818884727] [2023-04-01 02:36:28,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:36:28,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 02:36:28,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:36:28,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 02:36:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 02:36:28,606 INFO L87 Difference]: Start difference. First operand 106 states and 142 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 02:36:28,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:36:28,814 INFO L93 Difference]: Finished difference Result 173 states and 234 transitions. [2023-04-01 02:36:28,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 02:36:28,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2023-04-01 02:36:28,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:36:28,816 INFO L225 Difference]: With dead ends: 173 [2023-04-01 02:36:28,816 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 02:36:28,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=215, Invalid=1765, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 02:36:28,818 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:36:28,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 136 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:36:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 02:36:28,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2023-04-01 02:36:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2023-04-01 02:36:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2023-04-01 02:36:28,838 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 64 [2023-04-01 02:36:28,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:36:28,838 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2023-04-01 02:36:28,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 02:36:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2023-04-01 02:36:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 02:36:28,840 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:28,840 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:36:28,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 02:36:29,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:29,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:29,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:29,048 INFO L85 PathProgramCache]: Analyzing trace with hash 401628486, now seen corresponding path program 1 times [2023-04-01 02:36:29,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:29,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99003228] [2023-04-01 02:36:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:29,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 02:36:29,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:29,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99003228] [2023-04-01 02:36:29,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99003228] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:36:29,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633456034] [2023-04-01 02:36:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:29,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:29,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:29,177 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:36:29,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 02:36:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:29,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:36:29,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:36:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 02:36:29,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:36:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 02:36:29,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633456034] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:36:29,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130044197] [2023-04-01 02:36:29,373 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 02:36:29,373 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:36:29,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:36:29,373 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:36:29,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:36:29,385 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:36:29,925 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-01 02:36:29,933 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-01 02:36:29,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:36:29,944 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-01 02:36:29,990 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:36:31,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3861#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_98| Int)) (and (<= 2 |v_main_~#set~0.base_BEFORE_CALL_98|) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_98| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_98|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_98|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_98|) 0)))) (= |#NULL.base| 0))' at error location [2023-04-01 02:36:31,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:36:31,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:36:31,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 02:36:31,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611020383] [2023-04-01 02:36:31,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:36:31,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 02:36:31,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:36:31,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 02:36:31,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 02:36:31,501 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:36:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:36:31,613 INFO L93 Difference]: Finished difference Result 208 states and 273 transitions. [2023-04-01 02:36:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 02:36:31,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 76 [2023-04-01 02:36:31,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:36:31,615 INFO L225 Difference]: With dead ends: 208 [2023-04-01 02:36:31,615 INFO L226 Difference]: Without dead ends: 132 [2023-04-01 02:36:31,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 02:36:31,616 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:36:31,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 102 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:36:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-01 02:36:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2023-04-01 02:36:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.144927536231884) internal successors, (79), 70 states have internal predecessors, (79), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2023-04-01 02:36:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2023-04-01 02:36:31,637 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 76 [2023-04-01 02:36:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:36:31,638 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2023-04-01 02:36:31,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:36:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2023-04-01 02:36:31,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 02:36:31,639 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:31,639 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:36:31,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 02:36:31,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:31,840 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:31,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:31,840 INFO L85 PathProgramCache]: Analyzing trace with hash 219550182, now seen corresponding path program 2 times [2023-04-01 02:36:31,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:31,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138148676] [2023-04-01 02:36:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:31,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 02:36:32,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:32,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138148676] [2023-04-01 02:36:32,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138148676] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:36:32,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70744842] [2023-04-01 02:36:32,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:36:32,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:32,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:32,095 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:36:32,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 02:36:32,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:36:32,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:36:32,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:36:32,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:36:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-01 02:36:32,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:36:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-01 02:36:32,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70744842] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:36:32,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [492569719] [2023-04-01 02:36:32,355 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 02:36:32,356 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:36:32,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:36:32,357 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:36:32,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:36:32,367 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:36:32,956 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-01 02:36:32,967 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-01 02:36:32,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:36:32,977 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-01 02:36:33,021 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:36:34,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4866#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#set~0.base_BEFORE_CALL_115| Int)) (and (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_115| |#StackHeapBarrier|)) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_115|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_115|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_115|) 0) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_115|) 4)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:36:34,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:36:34,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:36:34,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 23 [2023-04-01 02:36:34,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066787304] [2023-04-01 02:36:34,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:36:34,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 02:36:34,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:36:34,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 02:36:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1894, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 02:36:34,585 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:36:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:36:34,934 INFO L93 Difference]: Finished difference Result 309 states and 414 transitions. [2023-04-01 02:36:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 02:36:34,934 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 82 [2023-04-01 02:36:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:36:34,937 INFO L225 Difference]: With dead ends: 309 [2023-04-01 02:36:34,937 INFO L226 Difference]: Without dead ends: 233 [2023-04-01 02:36:34,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=595, Invalid=2711, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 02:36:34,940 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 279 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:36:34,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 123 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:36:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-01 02:36:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 183. [2023-04-01 02:36:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 136 states have (on average 1.0735294117647058) internal successors, (146), 137 states have internal predecessors, (146), 39 states have call successors, (39), 7 states have call predecessors, (39), 7 states have return successors, (48), 38 states have call predecessors, (48), 38 states have call successors, (48) [2023-04-01 02:36:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 233 transitions. [2023-04-01 02:36:34,998 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 233 transitions. Word has length 82 [2023-04-01 02:36:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:36:34,999 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 233 transitions. [2023-04-01 02:36:34,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:36:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 233 transitions. [2023-04-01 02:36:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-01 02:36:35,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:35,007 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:36:35,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 02:36:35,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 02:36:35,209 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:35,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash -557369507, now seen corresponding path program 3 times [2023-04-01 02:36:35,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:35,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334192302] [2023-04-01 02:36:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:35,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-04-01 02:36:35,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:35,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334192302] [2023-04-01 02:36:35,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334192302] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:36:35,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114927508] [2023-04-01 02:36:35,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:36:35,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:35,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:35,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:36:35,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 02:36:36,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:36:36,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:36:36,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 02:36:36,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:36:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-04-01 02:36:36,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:36:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-04-01 02:36:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114927508] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:36:36,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567485329] [2023-04-01 02:36:36,659 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 02:36:36,659 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:36:36,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:36:36,660 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:36:36,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:36:36,680 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:36:37,235 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-01 02:36:37,244 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-01 02:36:37,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:36:37,267 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-01 02:36:37,332 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:36:39,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6697#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_132| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_132|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_132|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_132|) 0)) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_132| |#StackHeapBarrier|)) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_132|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:36:39,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:36:39,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:36:39,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2023-04-01 02:36:39,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518208043] [2023-04-01 02:36:39,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:36:39,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 02:36:39,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:36:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 02:36:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=3064, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 02:36:39,068 INFO L87 Difference]: Start difference. First operand 183 states and 233 transitions. Second operand has 36 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 36 states have internal predecessors, (143), 22 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) [2023-04-01 02:36:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:36:39,865 INFO L93 Difference]: Finished difference Result 584 states and 793 transitions. [2023-04-01 02:36:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-01 02:36:39,865 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 36 states have internal predecessors, (143), 22 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) Word has length 167 [2023-04-01 02:36:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:36:39,869 INFO L225 Difference]: With dead ends: 584 [2023-04-01 02:36:39,870 INFO L226 Difference]: Without dead ends: 418 [2023-04-01 02:36:39,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1391, Invalid=5415, Unknown=0, NotChecked=0, Total=6806 [2023-04-01 02:36:39,873 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 475 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 02:36:39,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 160 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 02:36:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-04-01 02:36:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 364. [2023-04-01 02:36:39,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 269 states have (on average 1.037174721189591) internal successors, (279), 270 states have internal predecessors, (279), 87 states have call successors, (87), 7 states have call predecessors, (87), 7 states have return successors, (108), 86 states have call predecessors, (108), 86 states have call successors, (108) [2023-04-01 02:36:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 474 transitions. [2023-04-01 02:36:39,951 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 474 transitions. Word has length 167 [2023-04-01 02:36:39,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:36:39,952 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 474 transitions. [2023-04-01 02:36:39,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 36 states have internal predecessors, (143), 22 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) [2023-04-01 02:36:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 474 transitions. [2023-04-01 02:36:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-04-01 02:36:39,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:39,958 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:36:39,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 02:36:40,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 02:36:40,166 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:40,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:40,166 INFO L85 PathProgramCache]: Analyzing trace with hash -845540730, now seen corresponding path program 4 times [2023-04-01 02:36:40,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:40,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489212300] [2023-04-01 02:36:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:40,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-01 02:36:40,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:40,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489212300] [2023-04-01 02:36:40,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489212300] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:36:40,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038182862] [2023-04-01 02:36:40,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:36:40,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:40,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:40,917 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:36:40,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 02:36:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:41,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 02:36:41,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:36:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-01 02:36:41,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:36:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-01 02:36:41,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038182862] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:36:41,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1333885412] [2023-04-01 02:36:41,658 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 02:36:41,659 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:36:41,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:36:41,659 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:36:41,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:36:41,673 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:36:42,235 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-01 02:36:42,244 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-01 02:36:42,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:36:42,255 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-01 02:36:42,302 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:36:43,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10252#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_149| Int)) (and (<= 2 |v_main_~#set~0.base_BEFORE_CALL_149|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_149|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_149|) 0)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_149|) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_149| |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 02:36:43,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:36:43,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:36:43,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-04-01 02:36:43,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284975268] [2023-04-01 02:36:43,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:36:43,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 02:36:43,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:36:43,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 02:36:43,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=798, Invalid=2064, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 02:36:43,862 INFO L87 Difference]: Start difference. First operand 364 states and 474 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:36:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:36:44,170 INFO L93 Difference]: Finished difference Result 828 states and 1113 transitions. [2023-04-01 02:36:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 02:36:44,170 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 336 [2023-04-01 02:36:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:36:44,173 INFO L225 Difference]: With dead ends: 828 [2023-04-01 02:36:44,173 INFO L226 Difference]: Without dead ends: 482 [2023-04-01 02:36:44,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=798, Invalid=2064, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 02:36:44,176 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 215 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:36:44,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 86 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:36:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-04-01 02:36:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 378. [2023-04-01 02:36:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 283 states have (on average 1.0353356890459364) internal successors, (293), 284 states have internal predecessors, (293), 87 states have call successors, (87), 7 states have call predecessors, (87), 7 states have return successors, (108), 86 states have call predecessors, (108), 86 states have call successors, (108) [2023-04-01 02:36:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 488 transitions. [2023-04-01 02:36:44,248 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 488 transitions. Word has length 336 [2023-04-01 02:36:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:36:44,249 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 488 transitions. [2023-04-01 02:36:44,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:36:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 488 transitions. [2023-04-01 02:36:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-04-01 02:36:44,254 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:36:44,254 INFO L195 NwaCegarLoop]: trace histogram [26, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:36:44,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 02:36:44,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 02:36:44,463 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:36:44,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:36:44,463 INFO L85 PathProgramCache]: Analyzing trace with hash 128926374, now seen corresponding path program 5 times [2023-04-01 02:36:44,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:36:44,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566066308] [2023-04-01 02:36:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:36:44,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:36:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:36:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-01 02:36:45,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:36:45,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566066308] [2023-04-01 02:36:45,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566066308] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:36:45,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219257436] [2023-04-01 02:36:45,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:36:45,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:36:45,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:36:45,844 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:36:45,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process