/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-lopstr16/partial_lesser_bound.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:29:42,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:29:42,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:29:42,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:29:42,561 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 [2023-03-30 22:29:42,586 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:29:42,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:29:42,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:29:42,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:29:42,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:29:42,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:29:42,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:29:42,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:29:42,588 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:29:42,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:29:42,588 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:29:42,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:29:42,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:29:42,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:29:42,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:29:42,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:29:42,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:29:42,589 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:29:42,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:29:42,589 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:29:42,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:29:42,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:29:42,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:29:42,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:29:42,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:29:42,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:29:42,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:29:42,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:29:42,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:29:42,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:29:42,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:29:42,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:29:42,590 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:29:42,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:29:42,590 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:29:42,590 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:29:42,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:29:42,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:29:42,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:29:42,801 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:29:42,801 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:29:42,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i [2023-03-30 22:29:43,932 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:29:44,087 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:29:44,088 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i [2023-03-30 22:29:44,092 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde738a84/8dea8498e6804ddfba64f54c41344601/FLAG14d423505 [2023-03-30 22:29:44,105 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde738a84/8dea8498e6804ddfba64f54c41344601 [2023-03-30 22:29:44,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:29:44,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:29:44,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:29:44,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:29:44,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:29:44,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:29:44" (1/1) ... [2023-03-30 22:29:44,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450f1270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44, skipping insertion in model container [2023-03-30 22:29:44,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:29:44" (1/1) ... [2023-03-30 22:29:44,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:29:44,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:29:44,217 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-lopstr16/partial_lesser_bound.i[813,826] [2023-03-30 22:29:44,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:29:44,241 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:29:44,251 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-lopstr16/partial_lesser_bound.i[813,826] [2023-03-30 22:29:44,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:29:44,268 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:29:44,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44 WrapperNode [2023-03-30 22:29:44,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:29:44,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:29:44,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:29:44,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:29:44,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44" (1/1) ... [2023-03-30 22:29:44,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44" (1/1) ... [2023-03-30 22:29:44,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44" (1/1) ... [2023-03-30 22:29:44,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44" (1/1) ... [2023-03-30 22:29:44,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44" (1/1) ... [2023-03-30 22:29:44,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44" (1/1) ... [2023-03-30 22:29:44,289 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44" (1/1) ... [2023-03-30 22:29:44,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44" (1/1) ... [2023-03-30 22:29:44,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:29:44,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:29:44,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:29:44,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:29:44,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44" (1/1) ... [2023-03-30 22:29:44,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:29:44,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:29:44,354 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) [2023-03-30 22:29:44,371 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 [2023-03-30 22:29:44,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:29:44,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:29:44,382 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:29:44,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:29:44,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:29:44,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:29:44,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-30 22:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-30 22:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-30 22:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-30 22:29:44,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:29:44,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:29:44,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:29:44,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:29:44,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:29:44,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:29:44,452 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:29:44,454 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:29:44,621 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:29:44,625 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:29:44,625 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-30 22:29:44,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:29:44 BoogieIcfgContainer [2023-03-30 22:29:44,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:29:44,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:29:44,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:29:44,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:29:44,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:29:44" (1/3) ... [2023-03-30 22:29:44,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2353c9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:29:44, skipping insertion in model container [2023-03-30 22:29:44,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:29:44" (2/3) ... [2023-03-30 22:29:44,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2353c9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:29:44, skipping insertion in model container [2023-03-30 22:29:44,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:29:44" (3/3) ... [2023-03-30 22:29:44,632 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound.i [2023-03-30 22:29:44,644 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:29:44,644 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:29:44,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:29:44,677 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;@7598b5e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:29:44,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:29:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 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) [2023-03-30 22:29:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-30 22:29:44,685 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:29:44,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:29:44,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:29:44,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:29:44,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1013160769, now seen corresponding path program 1 times [2023-03-30 22:29:44,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:29:44,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973660382] [2023-03-30 22:29:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:44,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:29:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:44,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:29:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:29:44,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:44,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973660382] [2023-03-30 22:29:44,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973660382] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:29:44,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:29:44,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:29:44,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981335166] [2023-03-30 22:29:44,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:29:44,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:29:44,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:29:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:29:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:29:44,930 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-03-30 22:29:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:29:44,990 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2023-03-30 22:29:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:29:44,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2023-03-30 22:29:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:29:44,997 INFO L225 Difference]: With dead ends: 46 [2023-03-30 22:29:44,998 INFO L226 Difference]: Without dead ends: 22 [2023-03-30 22:29:45,000 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 [2023-03-30 22:29:45,003 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:29:45,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-30 22:29:45,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-30 22:29:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-03-30 22:29:45,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-03-30 22:29:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-03-30 22:29:45,033 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2023-03-30 22:29:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:29:45,033 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-03-30 22:29:45,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-03-30 22:29:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-03-30 22:29:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-30 22:29:45,034 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:29:45,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:29:45,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:29:45,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:29:45,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:29:45,035 INFO L85 PathProgramCache]: Analyzing trace with hash 211576627, now seen corresponding path program 1 times [2023-03-30 22:29:45,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:29:45,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124529303] [2023-03-30 22:29:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:45,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:29:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:29:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:29:45,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124529303] [2023-03-30 22:29:45,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124529303] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:29:45,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:29:45,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:29:45,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800311471] [2023-03-30 22:29:45,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:29:45,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:29:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:29:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:29:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:29:45,133 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-03-30 22:29:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:29:45,244 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2023-03-30 22:29:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:29:45,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2023-03-30 22:29:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:29:45,246 INFO L225 Difference]: With dead ends: 50 [2023-03-30 22:29:45,246 INFO L226 Difference]: Without dead ends: 36 [2023-03-30 22:29:45,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:29:45,247 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:29:45,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 14 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:29:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-30 22:29:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2023-03-30 22:29:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-03-30 22:29:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-03-30 22:29:45,253 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2023-03-30 22:29:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:29:45,253 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-03-30 22:29:45,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-03-30 22:29:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-03-30 22:29:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-30 22:29:45,253 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:29:45,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:29:45,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:29:45,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:29:45,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:29:45,254 INFO L85 PathProgramCache]: Analyzing trace with hash 775264175, now seen corresponding path program 1 times [2023-03-30 22:29:45,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:29:45,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196416845] [2023-03-30 22:29:45,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:45,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:29:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:45,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:29:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:29:45,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:45,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196416845] [2023-03-30 22:29:45,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196416845] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:45,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810028691] [2023-03-30 22:29:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:45,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:45,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:29:45,360 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) [2023-03-30 22:29:45,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:29:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:45,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:29:45,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:29:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:29:45,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:29:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:29:45,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810028691] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:29:45,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:29:45,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:29:45,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370612601] [2023-03-30 22:29:45,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:29:45,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:29:45,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:29:45,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:29:45,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:29:45,495 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2023-03-30 22:29:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:29:45,642 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2023-03-30 22:29:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:29:45,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 19 [2023-03-30 22:29:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:29:45,646 INFO L225 Difference]: With dead ends: 71 [2023-03-30 22:29:45,646 INFO L226 Difference]: Without dead ends: 56 [2023-03-30 22:29:45,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:29:45,649 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 77 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:29:45,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 14 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:29:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-03-30 22:29:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2023-03-30 22:29:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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) [2023-03-30 22:29:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-03-30 22:29:45,655 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2023-03-30 22:29:45,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:29:45,655 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-03-30 22:29:45,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2023-03-30 22:29:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-03-30 22:29:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-30 22:29:45,656 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:29:45,656 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:29:45,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:29:45,861 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 [2023-03-30 22:29:45,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:29:45,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:29:45,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1709096679, now seen corresponding path program 2 times [2023-03-30 22:29:45,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:29:45,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067367889] [2023-03-30 22:29:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:45,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:29:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:46,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:29:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:29:46,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:46,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067367889] [2023-03-30 22:29:46,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067367889] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:46,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785460143] [2023-03-30 22:29:46,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:29:46,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:46,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:29:46,063 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) [2023-03-30 22:29:46,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:29:46,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:29:46,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:29:46,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:29:46,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:29:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-30 22:29:46,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:29:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-30 22:29:46,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785460143] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:29:46,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:29:46,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-03-30 22:29:46,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642644894] [2023-03-30 22:29:46,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:29:46,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:29:46,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:29:46,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:29:46,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:29:46,176 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 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) [2023-03-30 22:29:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:29:46,452 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2023-03-30 22:29:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-30 22:29:46,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 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 27 [2023-03-30 22:29:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:29:46,453 INFO L225 Difference]: With dead ends: 141 [2023-03-30 22:29:46,453 INFO L226 Difference]: Without dead ends: 124 [2023-03-30 22:29:46,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2023-03-30 22:29:46,455 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 177 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:29:46,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 22 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:29:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-03-30 22:29:46,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 52. [2023-03-30 22:29:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 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) [2023-03-30 22:29:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2023-03-30 22:29:46,463 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 27 [2023-03-30 22:29:46,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:29:46,463 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2023-03-30 22:29:46,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 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) [2023-03-30 22:29:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2023-03-30 22:29:46,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-30 22:29:46,464 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:29:46,464 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:29:46,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:29:46,669 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 [2023-03-30 22:29:46,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:29:46,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:29:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1111941907, now seen corresponding path program 3 times [2023-03-30 22:29:46,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:29:46,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314549846] [2023-03-30 22:29:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:46,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:29:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:46,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:29:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-03-30 22:29:46,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:46,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314549846] [2023-03-30 22:29:46,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314549846] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:46,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495669144] [2023-03-30 22:29:46,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:29:46,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:29:46,903 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) [2023-03-30 22:29:46,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:30:01,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-03-30 22:30:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:30:01,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-30 22:30:01,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:30:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-03-30 22:30:01,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:30:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-03-30 22:30:02,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495669144] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:30:02,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:30:02,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2023-03-30 22:30:02,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546610766] [2023-03-30 22:30:02,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:30:02,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-30 22:30:02,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:30:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-30 22:30:02,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2023-03-30 22:30:02,072 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 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) [2023-03-30 22:30:02,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:30:02,473 INFO L93 Difference]: Finished difference Result 197 states and 212 transitions. [2023-03-30 22:30:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-03-30 22:30:02,475 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 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 47 [2023-03-30 22:30:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:30:02,478 INFO L225 Difference]: With dead ends: 197 [2023-03-30 22:30:02,478 INFO L226 Difference]: Without dead ends: 168 [2023-03-30 22:30:02,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=569, Unknown=0, NotChecked=0, Total=992 [2023-03-30 22:30:02,479 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 381 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:30:02,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 22 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:30:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-03-30 22:30:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 74. [2023-03-30 22:30:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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) [2023-03-30 22:30:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2023-03-30 22:30:02,500 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 47 [2023-03-30 22:30:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:30:02,500 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2023-03-30 22:30:02,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 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) [2023-03-30 22:30:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2023-03-30 22:30:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-03-30 22:30:02,503 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:30:02,503 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:30:02,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:30:02,715 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 [2023-03-30 22:30:02,716 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:30:02,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:30:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1774280803, now seen corresponding path program 4 times [2023-03-30 22:30:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:30:02,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607985023] [2023-03-30 22:30:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:30:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:30:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:30:03,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:30:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:30:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-30 22:30:03,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:30:03,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607985023] [2023-03-30 22:30:03,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607985023] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:30:03,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900856875] [2023-03-30 22:30:03,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:30:03,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:30:03,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:30:03,295 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) [2023-03-30 22:30:03,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:30:03,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:30:03,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:30:03,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-30 22:30:03,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:30:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-30 22:30:03,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:30:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-30 22:30:03,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900856875] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:30:03,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:30:03,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2023-03-30 22:30:03,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540071193] [2023-03-30 22:30:03,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:30:03,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-03-30 22:30:03,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:30:03,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-03-30 22:30:03,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2023-03-30 22:30:03,919 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 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) [2023-03-30 22:30:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:30:04,721 INFO L93 Difference]: Finished difference Result 359 states and 393 transitions. [2023-03-30 22:30:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-03-30 22:30:04,721 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 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 69 [2023-03-30 22:30:04,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:30:04,723 INFO L225 Difference]: With dead ends: 359 [2023-03-30 22:30:04,723 INFO L226 Difference]: Without dead ends: 328 [2023-03-30 22:30:04,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1643, Invalid=2139, Unknown=0, NotChecked=0, Total=3782 [2023-03-30 22:30:04,725 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 843 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:30:04,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 32 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:30:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-03-30 22:30:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 134. [2023-03-30 22:30:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 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) [2023-03-30 22:30:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2023-03-30 22:30:04,735 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 69 [2023-03-30 22:30:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:30:04,735 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2023-03-30 22:30:04,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 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) [2023-03-30 22:30:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2023-03-30 22:30:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-03-30 22:30:04,736 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:30:04,737 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:30:04,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-30 22:30:04,942 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 [2023-03-30 22:30:04,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:30:04,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:30:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 887439137, now seen corresponding path program 5 times [2023-03-30 22:30:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:30:04,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886918733] [2023-03-30 22:30:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:30:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:30:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:30:06,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:30:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:30:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2023-03-30 22:30:06,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:30:06,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886918733] [2023-03-30 22:30:06,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886918733] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:30:06,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454116896] [2023-03-30 22:30:06,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:30:06,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:30:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:30:06,532 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) [2023-03-30 22:30:06,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process