/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/array-examples/standard_init5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:27:17,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:27:17,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:27:17,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:27:17,709 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 [2023-04-01 18:27:17,742 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:27:17,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:27:17,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:27:17,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:27:17,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:27:17,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:27:17,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:27:17,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:27:17,745 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:27:17,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:27:17,746 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:27:17,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:27:17,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:27:17,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:27:17,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:27:17,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:27:17,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:27:17,746 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:27:17,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:27:17,747 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:27:17,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:27:17,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:27:17,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:27:17,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:27:17,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:27:17,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:27:17,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:27:17,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:27:17,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:27:17,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:27:17,748 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:27:17,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:27:17,748 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:27:17,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:27:17,749 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:27:17,749 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:27:17,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:27:17,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:27:17,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:27:17,998 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:27:17,998 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:27:18,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init5_ground-2.i [2023-04-01 18:27:19,164 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:27:19,360 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:27:19,360 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init5_ground-2.i [2023-04-01 18:27:19,366 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/403611faf/8ca535f56b6c4cb7be774a48b38458e1/FLAG01fa20052 [2023-04-01 18:27:19,383 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/403611faf/8ca535f56b6c4cb7be774a48b38458e1 [2023-04-01 18:27:19,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:27:19,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:27:19,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:27:19,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:27:19,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:27:19,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:27:19" (1/1) ... [2023-04-01 18:27:19,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543a816a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19, skipping insertion in model container [2023-04-01 18:27:19,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:27:19" (1/1) ... [2023-04-01 18:27:19,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:27:19,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:27:19,526 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init5_ground-2.i[816,829] [2023-04-01 18:27:19,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:27:19,554 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:27:19,567 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init5_ground-2.i[816,829] [2023-04-01 18:27:19,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:27:19,596 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:27:19,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19 WrapperNode [2023-04-01 18:27:19,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:27:19,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:27:19,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:27:19,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:27:19,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19" (1/1) ... [2023-04-01 18:27:19,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19" (1/1) ... [2023-04-01 18:27:19,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19" (1/1) ... [2023-04-01 18:27:19,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19" (1/1) ... [2023-04-01 18:27:19,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19" (1/1) ... [2023-04-01 18:27:19,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19" (1/1) ... [2023-04-01 18:27:19,623 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19" (1/1) ... [2023-04-01 18:27:19,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19" (1/1) ... [2023-04-01 18:27:19,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:27:19,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:27:19,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:27:19,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:27:19,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19" (1/1) ... [2023-04-01 18:27:19,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:27:19,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:27:19,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 18:27:19,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 18:27:19,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:27:19,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:27:19,685 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:27:19,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:27:19,685 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:27:19,685 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:27:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:27:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:27:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:27:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:27:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:27:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:27:19,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:27:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:27:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:27:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:27:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:27:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:27:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:27:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:27:19,740 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:27:19,742 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:27:19,890 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:27:19,895 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:27:19,895 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-01 18:27:19,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:27:19 BoogieIcfgContainer [2023-04-01 18:27:19,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:27:19,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:27:19,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:27:19,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:27:19,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:27:19" (1/3) ... [2023-04-01 18:27:19,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd7fc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:27:19, skipping insertion in model container [2023-04-01 18:27:19,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:19" (2/3) ... [2023-04-01 18:27:19,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd7fc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:27:19, skipping insertion in model container [2023-04-01 18:27:19,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:27:19" (3/3) ... [2023-04-01 18:27:19,905 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-2.i [2023-04-01 18:27:19,921 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:27:19,922 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:27:19,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:27:20,011 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;@49fb252f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:27:20,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:27:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.608695652173913) internal successors, (37), 24 states have internal predecessors, (37), 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) [2023-04-01 18:27:20,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 18:27:20,029 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:27:20,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:27:20,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:27:20,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:27:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash -219930381, now seen corresponding path program 1 times [2023-04-01 18:27:20,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:27:20,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213315449] [2023-04-01 18:27:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:27:20,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:27:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:20,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:27:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:27:20,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:27:20,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213315449] [2023-04-01 18:27:20,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213315449] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:27:20,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:27:20,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:27:20,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865623784] [2023-04-01 18:27:20,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:27:20,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:27:20,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:27:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:27:20,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:27:20,248 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.608695652173913) internal successors, (37), 24 states have internal predecessors, (37), 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 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:27:20,351 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2023-04-01 18:27:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:27:20,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 18:27:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:27:20,369 INFO L225 Difference]: With dead ends: 55 [2023-04-01 18:27:20,369 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 18:27:20,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:27:20,375 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:27:20,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:27:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 18:27:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 18:27:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2023-04-01 18:27:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-04-01 18:27:20,406 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 21 [2023-04-01 18:27:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:27:20,406 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-04-01 18:27:20,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-04-01 18:27:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 18:27:20,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:27:20,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:27:20,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:27:20,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:27:20,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:27:20,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1955170321, now seen corresponding path program 1 times [2023-04-01 18:27:20,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:27:20,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126214385] [2023-04-01 18:27:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:27:20,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:27:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:20,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:27:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:27:20,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:27:20,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126214385] [2023-04-01 18:27:20,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126214385] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:27:20,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:27:20,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:27:20,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856565764] [2023-04-01 18:27:20,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:27:20,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:27:20,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:27:20,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:27:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:27:20,530 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:27:20,628 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-04-01 18:27:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:27:20,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 18:27:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:27:20,630 INFO L225 Difference]: With dead ends: 50 [2023-04-01 18:27:20,630 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 18:27:20,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:27:20,632 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:27:20,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 12 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:27:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 18:27:20,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 18:27:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-04-01 18:27:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-04-01 18:27:20,645 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2023-04-01 18:27:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:27:20,645 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-04-01 18:27:20,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-04-01 18:27:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 18:27:20,646 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:27:20,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:27:20,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:27:20,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:27:20,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:27:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1903223919, now seen corresponding path program 1 times [2023-04-01 18:27:20,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:27:20,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338266877] [2023-04-01 18:27:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:27:20,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:27:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:20,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:27:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:27:20,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:27:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338266877] [2023-04-01 18:27:20,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338266877] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:27:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478968524] [2023-04-01 18:27:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:27:20,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:27:20,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:27:20,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:27:20,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:27:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:20,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:27:20,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:27:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:27:20,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:27:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:27:21,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478968524] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:27:21,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:27:21,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:27:21,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617646014] [2023-04-01 18:27:21,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:27:21,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:27:21,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:27:21,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:27:21,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:27:21,010 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:27:21,183 INFO L93 Difference]: Finished difference Result 69 states and 93 transitions. [2023-04-01 18:27:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:27:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-04-01 18:27:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:27:21,187 INFO L225 Difference]: With dead ends: 69 [2023-04-01 18:27:21,187 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 18:27:21,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:27:21,191 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:27:21,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 12 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:27:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 18:27:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-04-01 18:27:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 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) [2023-04-01 18:27:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-04-01 18:27:21,216 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 26 [2023-04-01 18:27:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:27:21,217 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-04-01 18:27:21,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-04-01 18:27:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 18:27:21,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:27:21,219 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:27:21,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 18:27:21,425 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 [2023-04-01 18:27:21,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:27:21,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:27:21,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2143411601, now seen corresponding path program 2 times [2023-04-01 18:27:21,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:27:21,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780017513] [2023-04-01 18:27:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:27:21,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:27:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:21,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:27:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:27:21,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:27:21,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780017513] [2023-04-01 18:27:21,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780017513] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:27:21,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481096626] [2023-04-01 18:27:21,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:27:21,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:27:21,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:27:21,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:27:21,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:27:21,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:27:21,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:27:21,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:27:21,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:27:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:27:21,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:27:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:27:22,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481096626] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:27:22,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:27:22,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-01 18:27:22,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113193094] [2023-04-01 18:27:22,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:27:22,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 18:27:22,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:27:22,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 18:27:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-04-01 18:27:22,015 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:27:22,375 INFO L93 Difference]: Finished difference Result 111 states and 150 transitions. [2023-04-01 18:27:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 18:27:22,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-01 18:27:22,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:27:22,378 INFO L225 Difference]: With dead ends: 111 [2023-04-01 18:27:22,379 INFO L226 Difference]: Without dead ends: 76 [2023-04-01 18:27:22,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:27:22,381 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:27:22,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 27 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:27:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-01 18:27:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-04-01 18:27:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 70 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:27:22,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2023-04-01 18:27:22,407 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 41 [2023-04-01 18:27:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:27:22,408 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2023-04-01 18:27:22,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2023-04-01 18:27:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 18:27:22,412 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:27:22,412 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:27:22,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:27:22,618 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 [2023-04-01 18:27:22,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:27:22,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:27:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash -969983441, now seen corresponding path program 3 times [2023-04-01 18:27:22,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:27:22,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094115183] [2023-04-01 18:27:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:27:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:27:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:23,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:27:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-01 18:27:23,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:27:23,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094115183] [2023-04-01 18:27:23,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094115183] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:27:23,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129020994] [2023-04-01 18:27:23,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:27:23,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:27:23,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:27:23,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:27:23,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:27:25,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 18:27:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:27:25,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:27:25,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:27:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-01 18:27:26,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:27:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-01 18:27:26,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129020994] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:27:26,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:27:26,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:27:26,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645216238] [2023-04-01 18:27:26,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:27:26,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:27:26,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:27:26,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:27:26,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:27:26,225 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:27:26,882 INFO L93 Difference]: Finished difference Result 195 states and 264 transitions. [2023-04-01 18:27:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:27:26,882 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-04-01 18:27:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:27:26,883 INFO L225 Difference]: With dead ends: 195 [2023-04-01 18:27:26,884 INFO L226 Difference]: Without dead ends: 136 [2023-04-01 18:27:26,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 18:27:26,885 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 135 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:27:26,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 32 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:27:26,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-04-01 18:27:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-04-01 18:27:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0461538461538462) internal successors, (136), 130 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:27:26,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2023-04-01 18:27:26,916 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 71 [2023-04-01 18:27:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:27:26,916 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2023-04-01 18:27:26,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:26,917 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2023-04-01 18:27:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 18:27:26,923 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:27:26,923 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:27:26,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:27:27,134 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 [2023-04-01 18:27:27,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:27:27,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:27:27,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1575855697, now seen corresponding path program 4 times [2023-04-01 18:27:27,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:27:27,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960081454] [2023-04-01 18:27:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:27:27,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:27:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:28,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:27:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-04-01 18:27:28,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:27:28,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960081454] [2023-04-01 18:27:28,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960081454] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:27:28,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696905320] [2023-04-01 18:27:28,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:27:28,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:27:28,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:27:28,133 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:27:28,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:27:28,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:27:28,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:27:28,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 18:27:28,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:27:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-04-01 18:27:28,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:27:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-04-01 18:27:29,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696905320] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:27:29,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:27:29,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-04-01 18:27:29,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799270402] [2023-04-01 18:27:29,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:27:29,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 18:27:29,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:27:29,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 18:27:29,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 18:27:29,121 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 50 states, 50 states have (on average 1.4) internal successors, (70), 49 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:27:30,797 INFO L93 Difference]: Finished difference Result 363 states and 492 transitions. [2023-04-01 18:27:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 18:27:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 49 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2023-04-01 18:27:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:27:30,799 INFO L225 Difference]: With dead ends: 363 [2023-04-01 18:27:30,799 INFO L226 Difference]: Without dead ends: 256 [2023-04-01 18:27:30,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 18:27:30,803 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 255 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:27:30,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 47 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 18:27:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-04-01 18:27:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2023-04-01 18:27:30,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.024) internal successors, (256), 250 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:27:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 261 transitions. [2023-04-01 18:27:30,827 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 261 transitions. Word has length 131 [2023-04-01 18:27:30,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:27:30,827 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 261 transitions. [2023-04-01 18:27:30,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 49 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:27:30,827 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 261 transitions. [2023-04-01 18:27:30,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-04-01 18:27:30,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:27:30,829 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:27:30,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:27:31,037 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 [2023-04-01 18:27:31,037 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:27:31,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:27:31,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1616664751, now seen corresponding path program 5 times [2023-04-01 18:27:31,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:27:31,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839958539] [2023-04-01 18:27:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:27:31,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:27:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:34,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:27:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:27:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-04-01 18:27:34,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:27:34,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839958539] [2023-04-01 18:27:34,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839958539] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:27:34,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842006073] [2023-04-01 18:27:34,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:27:34,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:27:34,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:27:34,305 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:27:34,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process