/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/ldv-regression/test25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:08:12,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:08:12,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:08:12,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 00:08:12,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 00:08:12,986 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:08:12,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:08:12,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:08:12,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:08:12,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:08:12,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:08:12,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:08:12,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:08:12,989 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:08:12,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:08:12,990 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:08:12,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:08:12,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:08:12,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:08:12,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:08:12,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:08:12,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:08:12,990 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:08:12,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:08:12,991 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:08:12,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:08:12,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:08:12,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:08:12,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:08:12,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:08:12,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:08:12,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:08:12,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:08:12,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:08:12,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:08:12,992 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:08:12,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:08:12,992 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:08:12,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:08:12,993 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:08:12,993 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:08:13,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:08:13,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:08:13,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:08:13,220 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:08:13,220 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:08:13,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test25-1.c [2023-03-31 00:08:14,674 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:08:14,800 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:08:14,800 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c [2023-03-31 00:08:14,805 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2cb5849f/cd15288e8e514c7dbdcc9d6173741acd/FLAGef8dc3903 [2023-03-31 00:08:14,819 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2cb5849f/cd15288e8e514c7dbdcc9d6173741acd [2023-03-31 00:08:14,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:08:14,822 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:08:14,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:08:14,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:08:14,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:08:14,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:08:14" (1/1) ... [2023-03-31 00:08:14,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c1e132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:14, skipping insertion in model container [2023-03-31 00:08:14,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:08:14" (1/1) ... [2023-03-31 00:08:14,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:08:14,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:08:14,977 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/ldv-regression/test25-1.c[936,949] [2023-03-31 00:08:14,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:08:14,990 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:08:15,008 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/ldv-regression/test25-1.c[936,949] [2023-03-31 00:08:15,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:08:15,023 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:08:15,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:15 WrapperNode [2023-03-31 00:08:15,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:08:15,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:08:15,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:08:15,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:08:15,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:15" (1/1) ... [2023-03-31 00:08:15,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:15" (1/1) ... [2023-03-31 00:08:15,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:15" (1/1) ... [2023-03-31 00:08:15,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:15" (1/1) ... [2023-03-31 00:08:15,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:15" (1/1) ... [2023-03-31 00:08:15,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:15" (1/1) ... [2023-03-31 00:08:15,060 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:15" (1/1) ... [2023-03-31 00:08:15,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:15" (1/1) ... [2023-03-31 00:08:15,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:08:15,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:08:15,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:08:15,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:08:15,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:15" (1/1) ... [2023-03-31 00:08:15,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:08:15,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:08:15,085 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) [2023-03-31 00:08:15,103 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 [2023-03-31 00:08:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:08:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:08:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:08:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-03-31 00:08:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:08:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:08:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:08:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:08:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:08:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 00:08:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-03-31 00:08:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 00:08:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:08:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:08:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 00:08:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:08:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 00:08:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:08:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:08:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:08:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:08:15,176 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:08:15,177 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:08:15,295 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:08:15,299 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:08:15,299 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 00:08:15,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:08:15 BoogieIcfgContainer [2023-03-31 00:08:15,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:08:15,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:08:15,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:08:15,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:08:15,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:08:14" (1/3) ... [2023-03-31 00:08:15,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14677cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:08:15, skipping insertion in model container [2023-03-31 00:08:15,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:08:15" (2/3) ... [2023-03-31 00:08:15,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14677cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:08:15, skipping insertion in model container [2023-03-31 00:08:15,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:08:15" (3/3) ... [2023-03-31 00:08:15,311 INFO L112 eAbstractionObserver]: Analyzing ICFG test25-1.c [2023-03-31 00:08:15,324 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:08:15,324 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:08:15,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:08:15,371 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=PETRI_NET, 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;@1c9e1ae5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:08:15,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:08:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:08:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 00:08:15,380 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:08:15,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:08:15,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:08:15,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:08:15,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1142089908, now seen corresponding path program 1 times [2023-03-31 00:08:15,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:08:15,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455664225] [2023-03-31 00:08:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:08:15,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:08:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:15,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:08:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:15,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-03-31 00:08:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:08:15,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:08:15,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455664225] [2023-03-31 00:08:15,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455664225] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:08:15,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:08:15,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 00:08:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724540953] [2023-03-31 00:08:15,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:08:15,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 00:08:15,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:08:15,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 00:08:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:08:15,683 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:08:15,765 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-03-31 00:08:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 00:08:15,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-03-31 00:08:15,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:08:15,782 INFO L225 Difference]: With dead ends: 42 [2023-03-31 00:08:15,782 INFO L226 Difference]: Without dead ends: 20 [2023-03-31 00:08:15,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:08:15,789 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:08:15,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 10 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:08:15,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-03-31 00:08:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-03-31 00:08:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-03-31 00:08:15,826 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2023-03-31 00:08:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:08:15,827 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-03-31 00:08:15,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-03-31 00:08:15,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 00:08:15,829 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:08:15,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:08:15,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 00:08:15,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:08:15,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:08:15,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1950802148, now seen corresponding path program 1 times [2023-03-31 00:08:15,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:08:15,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736210132] [2023-03-31 00:08:15,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:08:15,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:08:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:15,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:08:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:16,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-03-31 00:08:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:08:16,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:08:16,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736210132] [2023-03-31 00:08:16,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736210132] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:08:16,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:08:16,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:08:16,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579560574] [2023-03-31 00:08:16,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:08:16,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:08:16,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:08:16,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:08:16,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:08:16,012 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:08:16,096 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-03-31 00:08:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:08:16,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-03-31 00:08:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:08:16,097 INFO L225 Difference]: With dead ends: 34 [2023-03-31 00:08:16,097 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 00:08:16,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:08:16,098 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:08:16,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:08:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 00:08:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-03-31 00:08:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-03-31 00:08:16,103 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2023-03-31 00:08:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:08:16,103 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-03-31 00:08:16,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-03-31 00:08:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 00:08:16,104 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:08:16,104 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] [2023-03-31 00:08:16,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 00:08:16,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:08:16,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:08:16,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1141942746, now seen corresponding path program 1 times [2023-03-31 00:08:16,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:08:16,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457431472] [2023-03-31 00:08:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:08:16,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:08:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:16,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:08:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:16,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-03-31 00:08:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:08:16,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:08:16,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457431472] [2023-03-31 00:08:16,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457431472] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:08:16,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531025403] [2023-03-31 00:08:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:08:16,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:08:16,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:08:16,235 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) [2023-03-31 00:08:16,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:08:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:16,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 00:08:16,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:08:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:08:16,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:08:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:08:16,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531025403] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:08:16,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:08:16,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-31 00:08:16,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511368206] [2023-03-31 00:08:16,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:08:16,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 00:08:16,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:08:16,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 00:08:16,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:08:16,426 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:08:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:08:16,497 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-03-31 00:08:16,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:08:16,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 3 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 20 [2023-03-31 00:08:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:08:16,499 INFO L225 Difference]: With dead ends: 39 [2023-03-31 00:08:16,499 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 00:08:16,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:08:16,500 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:08:16,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 12 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:08:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 00:08:16,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-03-31 00:08:16,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2023-03-31 00:08:16,505 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2023-03-31 00:08:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:08:16,505 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2023-03-31 00:08:16,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:08:16,505 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2023-03-31 00:08:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 00:08:16,506 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:08:16,506 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:08:16,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 00:08:16,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:08:16,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:08:16,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:08:16,712 INFO L85 PathProgramCache]: Analyzing trace with hash 695173868, now seen corresponding path program 2 times [2023-03-31 00:08:16,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:08:16,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843096985] [2023-03-31 00:08:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:08:16,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:08:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:16,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:08:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:16,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-31 00:08:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:08:16,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:08:16,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843096985] [2023-03-31 00:08:16,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843096985] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:08:16,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579198866] [2023-03-31 00:08:16,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:08:16,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:08:16,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:08:16,929 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) [2023-03-31 00:08:16,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:08:17,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-03-31 00:08:17,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:08:17,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 00:08:17,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:08:17,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:08:17,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 26 [2023-03-31 00:08:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 00:08:17,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:08:17,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579198866] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:08:17,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:08:17,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-31 00:08:17,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672656909] [2023-03-31 00:08:17,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:08:17,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:08:17,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:08:17,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:08:17,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:08:17,171 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:08:17,211 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2023-03-31 00:08:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:08:17,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-03-31 00:08:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:08:17,213 INFO L225 Difference]: With dead ends: 37 [2023-03-31 00:08:17,213 INFO L226 Difference]: Without dead ends: 29 [2023-03-31 00:08:17,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:08:17,214 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:08:17,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:08:17,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-31 00:08:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-03-31 00:08:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-03-31 00:08:17,219 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2023-03-31 00:08:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:08:17,219 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-03-31 00:08:17,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-03-31 00:08:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 00:08:17,220 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:08:17,220 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:08:17,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 00:08:17,425 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,SelfDestructingSolverStorable3 [2023-03-31 00:08:17,425 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:08:17,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:08:17,426 INFO L85 PathProgramCache]: Analyzing trace with hash 852988167, now seen corresponding path program 1 times [2023-03-31 00:08:17,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:08:17,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95120808] [2023-03-31 00:08:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:08:17,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:08:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:17,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:08:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:17,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-03-31 00:08:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 00:08:17,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:08:17,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95120808] [2023-03-31 00:08:17,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95120808] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:08:17,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153782951] [2023-03-31 00:08:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:08:17,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:08:17,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:08:17,649 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) [2023-03-31 00:08:17,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:08:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:17,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 00:08:17,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:08:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 00:08:17,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:08:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 00:08:17,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153782951] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:08:17,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:08:17,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-03-31 00:08:17,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059961628] [2023-03-31 00:08:17,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:08:17,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 00:08:17,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:08:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 00:08:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:08:17,839 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:08:17,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:08:17,998 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2023-03-31 00:08:17,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 00:08:17,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (5), 3 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 28 [2023-03-31 00:08:17,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:08:17,999 INFO L225 Difference]: With dead ends: 55 [2023-03-31 00:08:17,999 INFO L226 Difference]: Without dead ends: 41 [2023-03-31 00:08:17,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-03-31 00:08:18,000 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:08:18,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 22 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:08:18,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-03-31 00:08:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-03-31 00:08:18,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-03-31 00:08:18,006 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 28 [2023-03-31 00:08:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:08:18,006 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-03-31 00:08:18,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:08:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-03-31 00:08:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 00:08:18,007 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:08:18,007 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:08:18,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:08:18,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:08:18,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:08:18,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:08:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1815023085, now seen corresponding path program 2 times [2023-03-31 00:08:18,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:08:18,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066502849] [2023-03-31 00:08:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:08:18,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:08:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:21,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:08:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:21,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-03-31 00:08:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:08:21,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:08:21,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066502849] [2023-03-31 00:08:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066502849] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:08:21,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678280681] [2023-03-31 00:08:21,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:08:21,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:08:21,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:08:21,990 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) [2023-03-31 00:08:22,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:08:22,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:08:22,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:08:22,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 00:08:22,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:08:22,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:08:22,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 26 [2023-03-31 00:08:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-31 00:08:22,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:08:22,442 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-03-31 00:08:22,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2023-03-31 00:08:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-31 00:08:22,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678280681] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:08:22,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:08:22,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 23 [2023-03-31 00:08:22,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143976057] [2023-03-31 00:08:22,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:08:22,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-03-31 00:08:22,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:08:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-03-31 00:08:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-03-31 00:08:22,459 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:08:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:08:22,910 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2023-03-31 00:08:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-31 00:08:22,910 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (5), 3 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 40 [2023-03-31 00:08:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:08:22,911 INFO L225 Difference]: With dead ends: 55 [2023-03-31 00:08:22,911 INFO L226 Difference]: Without dead ends: 47 [2023-03-31 00:08:22,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2023-03-31 00:08:22,912 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 53 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:08:22,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 54 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:08:22,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-31 00:08:22,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-03-31 00:08:22,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-03-31 00:08:22,942 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 40 [2023-03-31 00:08:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:08:22,942 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-03-31 00:08:22,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:08:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-03-31 00:08:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 00:08:22,945 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:08:22,946 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:08:22,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-31 00:08:23,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:08:23,153 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:08:23,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:08:23,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1626914076, now seen corresponding path program 3 times [2023-03-31 00:08:23,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:08:23,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300939546] [2023-03-31 00:08:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:08:23,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:08:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:25,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:08:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:25,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-03-31 00:08:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:08:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 00:08:25,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:08:25,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300939546] [2023-03-31 00:08:25,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300939546] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:08:25,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666165127] [2023-03-31 00:08:25,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:08:25,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:08:25,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:08:25,740 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) [2023-03-31 00:08:25,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:08:25,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-03-31 00:08:25,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:08:25,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 00:08:25,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:08:26,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 00:08:26,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 26 [2023-03-31 00:08:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-31 00:08:26,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:08:26,299 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-03-31 00:08:26,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2023-03-31 00:08:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-31 00:08:26,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666165127] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:08:26,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:08:26,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 26 [2023-03-31 00:08:26,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770628866] [2023-03-31 00:08:26,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:08:26,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 00:08:26,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:08:26,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 00:08:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2023-03-31 00:08:26,323 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:08:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:08:26,915 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2023-03-31 00:08:26,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-03-31 00:08:26,916 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (5), 3 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 46 [2023-03-31 00:08:26,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:08:26,917 INFO L225 Difference]: With dead ends: 67 [2023-03-31 00:08:26,918 INFO L226 Difference]: Without dead ends: 59 [2023-03-31 00:08:26,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=556, Invalid=2096, Unknown=0, NotChecked=0, Total=2652 [2023-03-31 00:08:26,919 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 88 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:08:26,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 63 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:08:26,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-03-31 00:08:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-03-31 00:08:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:08:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2023-03-31 00:08:26,927 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 46 [2023-03-31 00:08:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:08:26,928 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2023-03-31 00:08:26,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:08:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2023-03-31 00:08:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-31 00:08:26,928 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:08:26,928 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:08:26,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 00:08:27,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:08:27,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:08:27,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:08:27,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1586589114, now seen corresponding path program 4 times [2023-03-31 00:08:27,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:08:27,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646907226] [2023-03-31 00:08:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:08:27,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:08:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 00:08:27,174 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 00:08:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 00:08:27,229 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-03-31 00:08:27,229 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 00:08:27,230 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 00:08:27,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 00:08:27,234 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1] [2023-03-31 00:08:27,237 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 00:08:27,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 12:08:27 BoogieIcfgContainer [2023-03-31 00:08:27,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 00:08:27,283 INFO L158 Benchmark]: Toolchain (without parser) took 12460.99ms. Allocated memory was 183.5MB in the beginning and 469.8MB in the end (delta: 286.3MB). Free memory was 151.0MB in the beginning and 219.6MB in the end (delta: -68.6MB). Peak memory consumption was 219.2MB. Max. memory is 8.0GB. [2023-03-31 00:08:27,283 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 00:08:27,283 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.05ms. Allocated memory is still 183.5MB. Free memory was 150.6MB in the beginning and 140.1MB in the end (delta: 10.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-03-31 00:08:27,284 INFO L158 Benchmark]: Boogie Preprocessor took 37.88ms. Allocated memory is still 183.5MB. Free memory was 140.1MB in the beginning and 138.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 00:08:27,284 INFO L158 Benchmark]: RCFGBuilder took 238.02ms. Allocated memory is still 183.5MB. Free memory was 138.4MB in the beginning and 125.4MB in the end (delta: 13.0MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-03-31 00:08:27,284 INFO L158 Benchmark]: TraceAbstraction took 11980.55ms. Allocated memory was 183.5MB in the beginning and 469.8MB in the end (delta: 286.3MB). Free memory was 124.8MB in the beginning and 219.6MB in the end (delta: -94.8MB). Peak memory consumption was 193.0MB. Max. memory is 8.0GB. [2023-03-31 00:08:27,285 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 199.05ms. Allocated memory is still 183.5MB. Free memory was 150.6MB in the beginning and 140.1MB in the end (delta: 10.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.88ms. Allocated memory is still 183.5MB. Free memory was 140.1MB in the beginning and 138.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 238.02ms. Allocated memory is still 183.5MB. Free memory was 138.4MB in the beginning and 125.4MB in the end (delta: 13.0MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 11980.55ms. Allocated memory was 183.5MB in the beginning and 469.8MB in the end (delta: 286.3MB). Free memory was 124.8MB in the beginning and 219.6MB in the end (delta: -94.8MB). Peak memory consumption was 193.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 47]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; VAL [array={5:0}, cont={6:0}, i=0, j=0] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=1] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=2] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=3] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=4] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=5] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=6] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=7] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=8] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=9] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=10] [L26] COND FALSE !(j < 10) VAL [array={5:0}, cont={6:0}, i=0, j=10] [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b VAL [array={5:0}, cont.array={5:0}, cont.array[0].b=17, cont={6:0}, i=0, j=10, pa={5:4}] [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=7, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=8, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=8, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=9, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=9, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=10, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=10, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=11, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=11, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=12, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=12, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=13, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=13, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=14, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=14, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=15, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=15, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=16, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=16, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=17, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=17, j=10, pa={5:4}] [L36] COND FALSE !(i < *pa) [L39] CALL, EXPR check(&cont, i) VAL [\old(i)=17, pc={6:0}] [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] RET, EXPR check(&cont, i) VAL [array={5:0}, check(&cont, i)=0, cont={6:0}, i=17, j=10, pa={5:4}] [L39] COND TRUE !check(&cont, i) [L47] reach_error() VAL [array={5:0}, cont={6:0}, i=17, j=10, pa={5:4}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.9s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 244 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 240 mSDsluCounter, 229 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 179 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 878 IncrementalHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 50 mSDtfsCounter, 878 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 441 GetRequests, 298 SyntacticMatches, 7 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=7, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 413 NumberOfCodeBlocks, 393 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 473 ConstructedInterpolants, 0 QuantifiedInterpolants, 1856 SizeOfPredicates, 32 NumberOfNonLiveVariables, 1231 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 479/755 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-03-31 00:08:27,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...