./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:26:24,685 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:26:24,754 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 14:26:24,760 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:26:24,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:26:24,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:26:24,788 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:26:24,789 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:26:24,789 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:26:24,793 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:26:24,793 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:26:24,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:26:24,794 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:26:24,794 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:26:24,794 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:26:24,795 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:26:24,795 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:26:24,795 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:26:24,795 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 14:26:24,796 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:26:24,796 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:26:24,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:26:24,798 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:26:24,798 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:26:24,798 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:26:24,799 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:26:24,799 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:26:24,799 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:26:24,799 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:26:24,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:26:24,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:26:24,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:26:24,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:26:24,802 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:26:24,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:26:24,802 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:26:24,802 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 14:26:24,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 14:26:24,803 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:26:24,803 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:26:24,803 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:26:24,803 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:26:24,804 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e [2024-11-08 14:26:25,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:26:25,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:26:25,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:26:25,107 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:26:25,107 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:26:25,108 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2024-11-08 14:26:26,472 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:26:26,649 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:26:26,650 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2024-11-08 14:26:26,657 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47531e0df/d45652d74c4b47cdb1bc16cc4de1259b/FLAG12a41e656 [2024-11-08 14:26:27,045 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47531e0df/d45652d74c4b47cdb1bc16cc4de1259b [2024-11-08 14:26:27,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:26:27,048 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:26:27,049 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:26:27,049 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:26:27,054 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:26:27,054 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,055 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67aac31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27, skipping insertion in model container [2024-11-08 14:26:27,055 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,075 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:26:27,280 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2024-11-08 14:26:27,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:26:27,317 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:26:27,330 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2024-11-08 14:26:27,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:26:27,368 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:26:27,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27 WrapperNode [2024-11-08 14:26:27,368 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:26:27,369 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:26:27,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:26:27,370 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:26:27,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,403 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2024-11-08 14:26:27,403 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:26:27,404 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:26:27,404 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:26:27,404 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:26:27,414 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,425 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,442 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-08 14:26:27,444 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,444 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,449 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,455 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,457 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:26:27,457 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:26:27,457 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:26:27,458 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:26:27,462 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (1/1) ... [2024-11-08 14:26:27,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:26:27,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:27,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 14:26:27,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 14:26:27,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:26:27,536 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 14:26:27,536 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 14:26:27,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 14:26:27,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:26:27,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:26:27,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 14:26:27,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 14:26:27,600 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:26:27,602 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:26:27,730 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-08 14:26:27,730 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:26:27,742 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:26:27,743 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 14:26:27,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:26:27 BoogieIcfgContainer [2024-11-08 14:26:27,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:26:27,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:26:27,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:26:27,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:26:27,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:26:27" (1/3) ... [2024-11-08 14:26:27,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fc017b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:26:27, skipping insertion in model container [2024-11-08 14:26:27,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:26:27" (2/3) ... [2024-11-08 14:26:27,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fc017b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:26:27, skipping insertion in model container [2024-11-08 14:26:27,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:26:27" (3/3) ... [2024-11-08 14:26:27,751 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.c [2024-11-08 14:26:27,766 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:26:27,766 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:26:27,815 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:26:27,821 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@2b4be2f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:26:27,825 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:26:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 14:26:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 14:26:27,838 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:27,839 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:27,840 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:27,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2024-11-08 14:26:27,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:27,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575737870] [2024-11-08 14:26:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:27,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:28,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:28,035 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:26:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:28,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:26:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:28,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:26:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:26:28,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:28,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575737870] [2024-11-08 14:26:28,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575737870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:26:28,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:26:28,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 14:26:28,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621868575] [2024-11-08 14:26:28,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:26:28,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 14:26:28,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:28,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 14:26:28,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:26:28,101 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 14:26:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:28,125 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2024-11-08 14:26:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 14:26:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-08 14:26:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:28,133 INFO L225 Difference]: With dead ends: 67 [2024-11-08 14:26:28,133 INFO L226 Difference]: Without dead ends: 31 [2024-11-08 14:26:28,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:26:28,140 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:28,141 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:26:28,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-08 14:26:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-08 14:26:28,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 14:26:28,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-11-08 14:26:28,184 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2024-11-08 14:26:28,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:28,185 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-11-08 14:26:28,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 14:26:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-11-08 14:26:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 14:26:28,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:28,188 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:28,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 14:26:28,189 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:28,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2024-11-08 14:26:28,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:28,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816407795] [2024-11-08 14:26:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:28,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:28,450 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:28,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:26:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:28,463 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:26:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:28,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:26:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 14:26:28,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:28,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816407795] [2024-11-08 14:26:28,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816407795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:26:28,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:26:28,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 14:26:28,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453558982] [2024-11-08 14:26:28,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:26:28,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 14:26:28,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:28,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 14:26:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:26:28,509 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 14:26:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:28,628 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2024-11-08 14:26:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:26:28,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-11-08 14:26:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:28,632 INFO L225 Difference]: With dead ends: 50 [2024-11-08 14:26:28,632 INFO L226 Difference]: Without dead ends: 43 [2024-11-08 14:26:28,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:26:28,634 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:28,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:26:28,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-08 14:26:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-11-08 14:26:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 14:26:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-11-08 14:26:28,653 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2024-11-08 14:26:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:28,653 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-11-08 14:26:28,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 14:26:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-11-08 14:26:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-08 14:26:28,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:28,655 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:28,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 14:26:28,656 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:28,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:28,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2024-11-08 14:26:28,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:28,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670281439] [2024-11-08 14:26:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:28,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:28,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087935784] [2024-11-08 14:26:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:28,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:28,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:28,718 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) [2024-11-08 14:26:28,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 14:26:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:28,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 14:26:28,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:26:28,937 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:26:28,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:28,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670281439] [2024-11-08 14:26:28,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:26:28,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087935784] [2024-11-08 14:26:28,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087935784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:26:28,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:26:28,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:26:28,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651334687] [2024-11-08 14:26:28,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:26:28,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:26:28,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:28,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:26:28,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:26:28,942 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 14:26:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:29,000 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-11-08 14:26:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:26:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-11-08 14:26:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:29,003 INFO L225 Difference]: With dead ends: 49 [2024-11-08 14:26:29,005 INFO L226 Difference]: Without dead ends: 47 [2024-11-08 14:26:29,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:26:29,006 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:29,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:26:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-08 14:26:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-11-08 14:26:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-08 14:26:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2024-11-08 14:26:29,022 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2024-11-08 14:26:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:29,023 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2024-11-08 14:26:29,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 14:26:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2024-11-08 14:26:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 14:26:29,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:29,025 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:29,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 14:26:29,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:29,226 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:29,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:29,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2024-11-08 14:26:29,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:29,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646169550] [2024-11-08 14:26:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:29,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:29,406 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:29,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:26:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:29,414 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:26:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:29,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:26:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 14:26:29,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:29,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646169550] [2024-11-08 14:26:29,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646169550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:29,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882198975] [2024-11-08 14:26:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:29,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:29,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:29,463 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) [2024-11-08 14:26:29,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 14:26:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:29,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 14:26:29,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 14:26:29,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 14:26:29,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882198975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:26:29,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:26:29,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-08 14:26:29,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141180691] [2024-11-08 14:26:29,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:29,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 14:26:29,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:29,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 14:26:29,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-08 14:26:29,711 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 14:26:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:29,957 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2024-11-08 14:26:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 14:26:29,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-11-08 14:26:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:29,960 INFO L225 Difference]: With dead ends: 99 [2024-11-08 14:26:29,961 INFO L226 Difference]: Without dead ends: 92 [2024-11-08 14:26:29,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-08 14:26:29,962 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 67 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:29,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 234 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:26:29,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-08 14:26:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2024-11-08 14:26:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-08 14:26:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2024-11-08 14:26:29,992 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2024-11-08 14:26:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:29,993 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2024-11-08 14:26:29,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 14:26:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2024-11-08 14:26:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 14:26:29,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:29,994 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:30,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 14:26:30,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-08 14:26:30,196 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:30,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:30,196 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2024-11-08 14:26:30,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:30,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396523346] [2024-11-08 14:26:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:30,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:30,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85823637] [2024-11-08 14:26:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:30,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:30,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:30,212 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) [2024-11-08 14:26:30,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 14:26:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:30,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 14:26:30,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:26:30,328 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:26:30,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396523346] [2024-11-08 14:26:30,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:26:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85823637] [2024-11-08 14:26:30,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85823637] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:26:30,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:26:30,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:26:30,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815898060] [2024-11-08 14:26:30,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:26:30,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:26:30,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:30,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:26:30,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:26:30,331 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 14:26:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:30,388 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2024-11-08 14:26:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:26:30,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-08 14:26:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:30,390 INFO L225 Difference]: With dead ends: 75 [2024-11-08 14:26:30,390 INFO L226 Difference]: Without dead ends: 73 [2024-11-08 14:26:30,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:26:30,392 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:30,392 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:26:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-08 14:26:30,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-11-08 14:26:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-08 14:26:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2024-11-08 14:26:30,405 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2024-11-08 14:26:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:30,405 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2024-11-08 14:26:30,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 14:26:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2024-11-08 14:26:30,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 14:26:30,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:30,407 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:30,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 14:26:30,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:30,608 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:30,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:30,608 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2024-11-08 14:26:30,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:30,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583801856] [2024-11-08 14:26:30,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:30,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:30,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067954389] [2024-11-08 14:26:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:30,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:30,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:30,627 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) [2024-11-08 14:26:30,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 14:26:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:30,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 14:26:30,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:26:30,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:26:30,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:30,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583801856] [2024-11-08 14:26:30,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:26:30,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067954389] [2024-11-08 14:26:30,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067954389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:26:30,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:26:30,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-11-08 14:26:30,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233167092] [2024-11-08 14:26:30,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:30,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 14:26:30,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:30,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 14:26:30,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-08 14:26:30,870 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 14:26:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:31,073 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2024-11-08 14:26:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:26:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-11-08 14:26:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:31,077 INFO L225 Difference]: With dead ends: 107 [2024-11-08 14:26:31,077 INFO L226 Difference]: Without dead ends: 105 [2024-11-08 14:26:31,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-08 14:26:31,078 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:31,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 235 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:26:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-08 14:26:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2024-11-08 14:26:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-08 14:26:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2024-11-08 14:26:31,109 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2024-11-08 14:26:31,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:31,110 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2024-11-08 14:26:31,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 14:26:31,110 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2024-11-08 14:26:31,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 14:26:31,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:31,111 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:31,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 14:26:31,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:31,316 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:31,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2024-11-08 14:26:31,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:31,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057895498] [2024-11-08 14:26:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:31,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071337571] [2024-11-08 14:26:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:31,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:31,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:31,333 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) [2024-11-08 14:26:31,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 14:26:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:31,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:26:31,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 14:26:31,435 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:26:31,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:31,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057895498] [2024-11-08 14:26:31,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:26:31,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071337571] [2024-11-08 14:26:31,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071337571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:26:31,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:26:31,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:26:31,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183213566] [2024-11-08 14:26:31,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:26:31,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:26:31,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:31,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:26:31,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:26:31,440 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 14:26:31,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:31,522 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2024-11-08 14:26:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:26:31,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-08 14:26:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:31,524 INFO L225 Difference]: With dead ends: 147 [2024-11-08 14:26:31,526 INFO L226 Difference]: Without dead ends: 145 [2024-11-08 14:26:31,527 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:26:31,528 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:31,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:26:31,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-08 14:26:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2024-11-08 14:26:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-08 14:26:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2024-11-08 14:26:31,574 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2024-11-08 14:26:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:31,575 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2024-11-08 14:26:31,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 14:26:31,575 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2024-11-08 14:26:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 14:26:31,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:31,576 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:31,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 14:26:31,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:31,777 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:31,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2024-11-08 14:26:31,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:31,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34863497] [2024-11-08 14:26:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:31,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:31,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795215211] [2024-11-08 14:26:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:31,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:31,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:31,795 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:31,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 14:26:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:31,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 14:26:31,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:26:32,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:32,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:32,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34863497] [2024-11-08 14:26:32,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:26:32,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795215211] [2024-11-08 14:26:32,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795215211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:32,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:26:32,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-11-08 14:26:32,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956337823] [2024-11-08 14:26:32,067 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:32,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 14:26:32,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 14:26:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:26:32,068 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 14:26:32,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:32,227 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2024-11-08 14:26:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 14:26:32,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-11-08 14:26:32,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:32,230 INFO L225 Difference]: With dead ends: 152 [2024-11-08 14:26:32,230 INFO L226 Difference]: Without dead ends: 150 [2024-11-08 14:26:32,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-08 14:26:32,231 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 26 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:32,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 209 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:26:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-08 14:26:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2024-11-08 14:26:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 94 states have internal predecessors, (118), 45 states have call successors, (45), 8 states have call predecessors, (45), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-08 14:26:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 207 transitions. [2024-11-08 14:26:32,265 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 207 transitions. Word has length 43 [2024-11-08 14:26:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:32,266 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 207 transitions. [2024-11-08 14:26:32,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 14:26:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 207 transitions. [2024-11-08 14:26:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 14:26:32,267 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:32,267 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:32,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 14:26:32,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:32,468 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:32,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:32,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2024-11-08 14:26:32,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:32,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473300609] [2024-11-08 14:26:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:32,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:32,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:32,535 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:26:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:32,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:26:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:32,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:26:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:26:32,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:32,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473300609] [2024-11-08 14:26:32,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473300609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:26:32,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:26:32,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:26:32,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028658671] [2024-11-08 14:26:32,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:26:32,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:26:32,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:32,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:26:32,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:26:32,543 INFO L87 Difference]: Start difference. First operand 147 states and 207 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 14:26:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:32,632 INFO L93 Difference]: Finished difference Result 186 states and 259 transitions. [2024-11-08 14:26:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 14:26:32,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2024-11-08 14:26:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:32,634 INFO L225 Difference]: With dead ends: 186 [2024-11-08 14:26:32,634 INFO L226 Difference]: Without dead ends: 130 [2024-11-08 14:26:32,634 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:26:32,635 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:32,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 160 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:26:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-08 14:26:32,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2024-11-08 14:26:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 77 states have internal predecessors, (92), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-08 14:26:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2024-11-08 14:26:32,660 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 43 [2024-11-08 14:26:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:32,660 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2024-11-08 14:26:32,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 14:26:32,660 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2024-11-08 14:26:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-08 14:26:32,664 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:32,664 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:32,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 14:26:32,664 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:32,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2024-11-08 14:26:32,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:32,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070880299] [2024-11-08 14:26:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:32,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:32,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733955284] [2024-11-08 14:26:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:32,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:32,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:32,684 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:32,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 14:26:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:32,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 14:26:32,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 14:26:32,779 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 14:26:32,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:32,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070880299] [2024-11-08 14:26:32,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:26:32,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733955284] [2024-11-08 14:26:32,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733955284] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:26:32,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:26:32,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 14:26:32,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332803610] [2024-11-08 14:26:32,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:26:32,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:26:32,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:26:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:26:32,781 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-08 14:26:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:32,847 INFO L93 Difference]: Finished difference Result 180 states and 262 transitions. [2024-11-08 14:26:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:26:32,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2024-11-08 14:26:32,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:32,864 INFO L225 Difference]: With dead ends: 180 [2024-11-08 14:26:32,864 INFO L226 Difference]: Without dead ends: 178 [2024-11-08 14:26:32,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 14:26:32,865 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:32,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 132 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:26:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-08 14:26:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2024-11-08 14:26:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 69 states have call successors, (69), 9 states have call predecessors, (69), 9 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2024-11-08 14:26:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 240 transitions. [2024-11-08 14:26:32,900 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 240 transitions. Word has length 48 [2024-11-08 14:26:32,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:32,900 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 240 transitions. [2024-11-08 14:26:32,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-08 14:26:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 240 transitions. [2024-11-08 14:26:32,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-08 14:26:32,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:32,904 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:32,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 14:26:33,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:33,104 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:33,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2024-11-08 14:26:33,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:33,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527618836] [2024-11-08 14:26:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:33,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:33,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785685484] [2024-11-08 14:26:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:33,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:33,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:33,128 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:33,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 14:26:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:33,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-08 14:26:33,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-08 14:26:33,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 14:26:35,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:35,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527618836] [2024-11-08 14:26:35,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:26:35,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785685484] [2024-11-08 14:26:35,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785685484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:26:35,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:26:35,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-08 14:26:35,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260186160] [2024-11-08 14:26:35,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:35,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 14:26:35,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:35,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 14:26:35,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-08 14:26:35,452 INFO L87 Difference]: Start difference. First operand 166 states and 240 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-08 14:26:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:39,199 INFO L93 Difference]: Finished difference Result 445 states and 665 transitions. [2024-11-08 14:26:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-08 14:26:39,200 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 60 [2024-11-08 14:26:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:39,204 INFO L225 Difference]: With dead ends: 445 [2024-11-08 14:26:39,204 INFO L226 Difference]: Without dead ends: 342 [2024-11-08 14:26:39,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-11-08 14:26:39,208 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 167 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:39,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 391 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-08 14:26:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-08 14:26:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 256. [2024-11-08 14:26:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 150 states have (on average 1.2066666666666668) internal successors, (181), 157 states have internal predecessors, (181), 93 states have call successors, (93), 12 states have call predecessors, (93), 12 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-08 14:26:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 366 transitions. [2024-11-08 14:26:39,295 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 366 transitions. Word has length 60 [2024-11-08 14:26:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:39,295 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 366 transitions. [2024-11-08 14:26:39,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-08 14:26:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 366 transitions. [2024-11-08 14:26:39,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-08 14:26:39,297 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:39,297 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:39,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 14:26:39,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 14:26:39,498 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:39,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:39,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2024-11-08 14:26:39,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:39,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425103347] [2024-11-08 14:26:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:39,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:39,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882130094] [2024-11-08 14:26:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:39,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:39,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:39,519 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:39,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 14:26:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:39,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 14:26:39,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-08 14:26:39,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-08 14:26:39,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:39,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425103347] [2024-11-08 14:26:39,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:26:39,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882130094] [2024-11-08 14:26:39,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882130094] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:39,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:26:39,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-08 14:26:39,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528812811] [2024-11-08 14:26:39,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:26:39,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 14:26:39,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:39,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 14:26:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 14:26:39,726 INFO L87 Difference]: Start difference. First operand 256 states and 366 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-08 14:26:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:39,864 INFO L93 Difference]: Finished difference Result 262 states and 371 transitions. [2024-11-08 14:26:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:26:39,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2024-11-08 14:26:39,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:39,867 INFO L225 Difference]: With dead ends: 262 [2024-11-08 14:26:39,867 INFO L226 Difference]: Without dead ends: 260 [2024-11-08 14:26:39,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-08 14:26:39,869 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:39,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 127 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:26:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-08 14:26:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2024-11-08 14:26:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 153 states have (on average 1.2026143790849673) internal successors, (184), 160 states have internal predecessors, (184), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-08 14:26:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 369 transitions. [2024-11-08 14:26:39,964 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 369 transitions. Word has length 70 [2024-11-08 14:26:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:39,965 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 369 transitions. [2024-11-08 14:26:39,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-08 14:26:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 369 transitions. [2024-11-08 14:26:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-08 14:26:39,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:39,966 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:39,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 14:26:40,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:40,167 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:40,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2024-11-08 14:26:40,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:40,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71168899] [2024-11-08 14:26:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:40,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:40,410 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:40,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:26:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:40,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:26:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:40,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:26:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:40,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-08 14:26:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:40,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-08 14:26:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:40,465 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-08 14:26:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:40,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-08 14:26:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-08 14:26:40,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:40,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71168899] [2024-11-08 14:26:40,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71168899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:40,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098298882] [2024-11-08 14:26:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:40,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:40,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:40,483 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:40,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 14:26:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:40,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 14:26:40,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-08 14:26:40,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-08 14:26:40,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098298882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:26:40,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:26:40,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-11-08 14:26:40,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894329586] [2024-11-08 14:26:40,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:40,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 14:26:40,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:40,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 14:26:40,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-08 14:26:40,826 INFO L87 Difference]: Start difference. First operand 260 states and 369 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-08 14:26:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:41,283 INFO L93 Difference]: Finished difference Result 383 states and 541 transitions. [2024-11-08 14:26:41,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 14:26:41,284 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 68 [2024-11-08 14:26:41,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:41,287 INFO L225 Difference]: With dead ends: 383 [2024-11-08 14:26:41,287 INFO L226 Difference]: Without dead ends: 247 [2024-11-08 14:26:41,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2024-11-08 14:26:41,289 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 51 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:41,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 426 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:26:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-08 14:26:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 232. [2024-11-08 14:26:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 129 states have (on average 1.1705426356589148) internal successors, (151), 135 states have internal predecessors, (151), 89 states have call successors, (89), 13 states have call predecessors, (89), 13 states have return successors, (88), 83 states have call predecessors, (88), 88 states have call successors, (88) [2024-11-08 14:26:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 328 transitions. [2024-11-08 14:26:41,409 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 328 transitions. Word has length 68 [2024-11-08 14:26:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:41,409 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 328 transitions. [2024-11-08 14:26:41,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-08 14:26:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 328 transitions. [2024-11-08 14:26:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-08 14:26:41,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:41,412 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:41,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 14:26:41,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 14:26:41,612 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:41,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:41,613 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2024-11-08 14:26:41,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:41,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518085011] [2024-11-08 14:26:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:41,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 14:26:41,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711146050] [2024-11-08 14:26:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:41,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:41,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:41,642 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:41,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 14:26:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:41,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-08 14:26:41,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-11-08 14:26:43,042 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:47,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:47,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518085011] [2024-11-08 14:26:47,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 14:26:47,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711146050] [2024-11-08 14:26:47,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711146050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:47,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 14:26:47,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-08 14:26:47,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303970259] [2024-11-08 14:26:47,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:47,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 14:26:47,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 14:26:47,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2024-11-08 14:26:47,998 INFO L87 Difference]: Start difference. First operand 232 states and 328 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-08 14:26:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:49,070 INFO L93 Difference]: Finished difference Result 311 states and 437 transitions. [2024-11-08 14:26:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 14:26:49,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 87 [2024-11-08 14:26:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:49,072 INFO L225 Difference]: With dead ends: 311 [2024-11-08 14:26:49,073 INFO L226 Difference]: Without dead ends: 308 [2024-11-08 14:26:49,073 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=288, Invalid=1518, Unknown=0, NotChecked=0, Total=1806 [2024-11-08 14:26:49,074 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:49,074 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 428 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 14:26:49,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-08 14:26:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 303. [2024-11-08 14:26:49,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 167 states have (on average 1.1676646706586826) internal successors, (195), 175 states have internal predecessors, (195), 117 states have call successors, (117), 18 states have call predecessors, (117), 18 states have return successors, (116), 109 states have call predecessors, (116), 116 states have call successors, (116) [2024-11-08 14:26:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 428 transitions. [2024-11-08 14:26:49,198 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 428 transitions. Word has length 87 [2024-11-08 14:26:49,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:49,198 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 428 transitions. [2024-11-08 14:26:49,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-08 14:26:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 428 transitions. [2024-11-08 14:26:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-08 14:26:49,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:49,200 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:49,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 14:26:49,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 14:26:49,401 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:49,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:49,401 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2024-11-08 14:26:49,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:49,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702522881] [2024-11-08 14:26:49,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:49,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:26:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:26:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,653 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:26:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,656 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-08 14:26:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-08 14:26:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-08 14:26:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-08 14:26:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-08 14:26:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,682 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-08 14:26:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-08 14:26:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,694 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-11-08 14:26:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-11-08 14:26:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-11-08 14:26:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-08 14:26:49,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:49,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702522881] [2024-11-08 14:26:49,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702522881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:49,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932572562] [2024-11-08 14:26:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:49,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:49,708 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:49,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 14:26:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:49,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 14:26:49,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 90 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-08 14:26:49,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-08 14:26:50,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932572562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:26:50,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:26:50,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2024-11-08 14:26:50,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855212465] [2024-11-08 14:26:50,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:50,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 14:26:50,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:50,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 14:26:50,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-08 14:26:50,151 INFO L87 Difference]: Start difference. First operand 303 states and 428 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2024-11-08 14:26:50,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:50,684 INFO L93 Difference]: Finished difference Result 478 states and 674 transitions. [2024-11-08 14:26:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 14:26:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) Word has length 90 [2024-11-08 14:26:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:50,687 INFO L225 Difference]: With dead ends: 478 [2024-11-08 14:26:50,687 INFO L226 Difference]: Without dead ends: 313 [2024-11-08 14:26:50,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 14:26:50,690 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:50,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 396 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 14:26:50,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-11-08 14:26:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 301. [2024-11-08 14:26:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 173 states have (on average 1.1791907514450868) internal successors, (204), 174 states have internal predecessors, (204), 109 states have call successors, (109), 18 states have call predecessors, (109), 18 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-08 14:26:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 421 transitions. [2024-11-08 14:26:50,814 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 421 transitions. Word has length 90 [2024-11-08 14:26:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:50,815 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 421 transitions. [2024-11-08 14:26:50,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2024-11-08 14:26:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 421 transitions. [2024-11-08 14:26:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-08 14:26:50,816 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:50,816 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:50,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 14:26:51,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 14:26:51,018 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:51,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:51,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1599365144, now seen corresponding path program 1 times [2024-11-08 14:26:51,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:51,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885671811] [2024-11-08 14:26:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:51,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:26:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:26:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,306 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:26:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,308 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-08 14:26:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-08 14:26:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-08 14:26:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-08 14:26:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-08 14:26:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-08 14:26:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-08 14:26:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-11-08 14:26:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-11-08 14:26:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-08 14:26:51,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:51,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885671811] [2024-11-08 14:26:51,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885671811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:51,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939860483] [2024-11-08 14:26:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:51,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:51,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:51,343 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:51,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 14:26:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:51,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 14:26:51,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 58 proven. 19 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-11-08 14:26:51,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-08 14:26:51,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939860483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:26:51,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:26:51,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2024-11-08 14:26:51,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060102335] [2024-11-08 14:26:51,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:51,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 14:26:51,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 14:26:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-11-08 14:26:51,909 INFO L87 Difference]: Start difference. First operand 301 states and 421 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) [2024-11-08 14:26:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:52,618 INFO L93 Difference]: Finished difference Result 359 states and 495 transitions. [2024-11-08 14:26:52,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 14:26:52,619 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) Word has length 90 [2024-11-08 14:26:52,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:52,622 INFO L225 Difference]: With dead ends: 359 [2024-11-08 14:26:52,622 INFO L226 Difference]: Without dead ends: 223 [2024-11-08 14:26:52,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 14:26:52,624 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 72 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:52,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 462 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 14:26:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-08 14:26:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2024-11-08 14:26:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 129 states have (on average 1.1550387596899225) internal successors, (149), 130 states have internal predecessors, (149), 77 states have call successors, (77), 16 states have call predecessors, (77), 16 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-11-08 14:26:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 302 transitions. [2024-11-08 14:26:52,718 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 302 transitions. Word has length 90 [2024-11-08 14:26:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:52,718 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 302 transitions. [2024-11-08 14:26:52,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) [2024-11-08 14:26:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 302 transitions. [2024-11-08 14:26:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-08 14:26:52,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:52,720 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:52,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 14:26:52,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 14:26:52,924 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:52,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:52,924 INFO L85 PathProgramCache]: Analyzing trace with hash -733012594, now seen corresponding path program 2 times [2024-11-08 14:26:52,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:52,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648731612] [2024-11-08 14:26:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:52,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:26:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:26:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,196 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:26:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-08 14:26:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-08 14:26:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-08 14:26:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-08 14:26:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-08 14:26:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-08 14:26:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-11-08 14:26:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-08 14:26:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,241 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-11-08 14:26:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,247 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-11-08 14:26:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 31 proven. 20 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-08 14:26:53,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648731612] [2024-11-08 14:26:53,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648731612] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215010689] [2024-11-08 14:26:53,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:26:53,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:53,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:53,256 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:53,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 14:26:53,334 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:26:53,334 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:26:53,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 14:26:53,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 93 proven. 18 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-08 14:26:53,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 31 proven. 20 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-08 14:26:53,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215010689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:26:53,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:26:53,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2024-11-08 14:26:53,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669490210] [2024-11-08 14:26:53,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:53,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 14:26:53,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 14:26:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2024-11-08 14:26:53,741 INFO L87 Difference]: Start difference. First operand 223 states and 302 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 10 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-11-08 14:26:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:54,122 INFO L93 Difference]: Finished difference Result 280 states and 365 transitions. [2024-11-08 14:26:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 14:26:54,123 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 10 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 95 [2024-11-08 14:26:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:54,125 INFO L225 Difference]: With dead ends: 280 [2024-11-08 14:26:54,125 INFO L226 Difference]: Without dead ends: 164 [2024-11-08 14:26:54,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 14:26:54,126 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:54,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 448 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:26:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-08 14:26:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2024-11-08 14:26:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 99 states have internal predecessors, (106), 45 states have call successors, (45), 14 states have call predecessors, (45), 14 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-08 14:26:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 195 transitions. [2024-11-08 14:26:54,200 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 195 transitions. Word has length 95 [2024-11-08 14:26:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:54,200 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 195 transitions. [2024-11-08 14:26:54,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 10 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-11-08 14:26:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 195 transitions. [2024-11-08 14:26:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-08 14:26:54,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:54,201 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:54,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 14:26:54,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:54,404 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:54,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1141584144, now seen corresponding path program 3 times [2024-11-08 14:26:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:54,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56356846] [2024-11-08 14:26:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:54,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:26:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:26:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,611 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:26:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-08 14:26:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,615 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-08 14:26:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-08 14:26:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-08 14:26:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-08 14:26:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,623 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-08 14:26:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-11-08 14:26:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-08 14:26:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-11-08 14:26:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-08 14:26:54,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:54,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56356846] [2024-11-08 14:26:54,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56356846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:54,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553439881] [2024-11-08 14:26:54,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:26:54,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:54,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:54,635 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:54,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 14:26:54,697 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 14:26:54,698 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:26:54,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 14:26:54,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 71 proven. 17 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-11-08 14:26:54,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-08 14:26:55,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553439881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:26:55,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:26:55,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 28 [2024-11-08 14:26:55,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818099329] [2024-11-08 14:26:55,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:55,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 14:26:55,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:55,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 14:26:55,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2024-11-08 14:26:55,197 INFO L87 Difference]: Start difference. First operand 158 states and 195 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 26 states have internal predecessors, (73), 10 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2024-11-08 14:26:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:55,823 INFO L93 Difference]: Finished difference Result 188 states and 228 transitions. [2024-11-08 14:26:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 14:26:55,823 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 26 states have internal predecessors, (73), 10 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) Word has length 95 [2024-11-08 14:26:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:55,824 INFO L225 Difference]: With dead ends: 188 [2024-11-08 14:26:55,824 INFO L226 Difference]: Without dead ends: 120 [2024-11-08 14:26:55,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=412, Invalid=1568, Unknown=0, NotChecked=0, Total=1980 [2024-11-08 14:26:55,826 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 65 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:55,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 592 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 14:26:55,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-08 14:26:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2024-11-08 14:26:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-08 14:26:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2024-11-08 14:26:55,862 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 95 [2024-11-08 14:26:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:55,863 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2024-11-08 14:26:55,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 26 states have internal predecessors, (73), 10 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2024-11-08 14:26:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2024-11-08 14:26:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-08 14:26:55,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:55,864 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:55,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 14:26:56,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 14:26:56,069 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:56,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1084123749, now seen corresponding path program 2 times [2024-11-08 14:26:56,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:56,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926354245] [2024-11-08 14:26:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:56,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,302 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:26:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,327 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:26:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,329 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:26:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,332 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-08 14:26:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-08 14:26:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-08 14:26:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-08 14:26:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-08 14:26:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,350 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-08 14:26:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-08 14:26:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,356 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-11-08 14:26:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-11-08 14:26:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-08 14:26:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-08 14:26:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-08 14:26:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 26 proven. 29 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-08 14:26:56,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:56,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926354245] [2024-11-08 14:26:56,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926354245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:56,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043659876] [2024-11-08 14:26:56,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:26:56,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:56,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:56,382 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:56,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 14:26:56,480 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:26:56,481 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:26:56,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 14:26:56,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:26:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 26 proven. 29 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-08 14:26:56,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:26:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 26 proven. 29 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-08 14:26:56,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043659876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:26:56,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:26:56,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2024-11-08 14:26:56,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137562521] [2024-11-08 14:26:56,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:26:56,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 14:26:56,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:26:56,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 14:26:56,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-08 14:26:56,990 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 11 states have call predecessors, (44), 12 states have call successors, (44) [2024-11-08 14:26:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:26:57,424 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2024-11-08 14:26:57,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 14:26:57,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 11 states have call predecessors, (44), 12 states have call successors, (44) Word has length 104 [2024-11-08 14:26:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:26:57,426 INFO L225 Difference]: With dead ends: 125 [2024-11-08 14:26:57,426 INFO L226 Difference]: Without dead ends: 80 [2024-11-08 14:26:57,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2024-11-08 14:26:57,427 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 44 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:26:57,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 550 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:26:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-08 14:26:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-08 14:26:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 21 states have call successors, (21), 8 states have call predecessors, (21), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-08 14:26:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-11-08 14:26:57,455 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 104 [2024-11-08 14:26:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:26:57,455 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-11-08 14:26:57,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 11 states have call predecessors, (44), 12 states have call successors, (44) [2024-11-08 14:26:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-11-08 14:26:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-08 14:26:57,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:26:57,457 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:26:57,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 14:26:57,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:57,660 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:26:57,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:26:57,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2030427454, now seen corresponding path program 3 times [2024-11-08 14:26:57,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:26:57,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882373294] [2024-11-08 14:26:57,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:26:57,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:26:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 14:26:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,937 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 14:26:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,964 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 14:26:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 14:26:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-08 14:26:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,976 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-08 14:26:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,979 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-08 14:26:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,982 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-08 14:26:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-08 14:26:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,988 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-08 14:26:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,991 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-11-08 14:26:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,994 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-08 14:26:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:57,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-08 14:26:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:58,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-08 14:26:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:58,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-08 14:26:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:58,011 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-11-08 14:26:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:58,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-11-08 14:26:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:58,019 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-11-08 14:26:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:58,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-11-08 14:26:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:58,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-11-08 14:26:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:26:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 40 proven. 50 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-11-08 14:26:58,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:26:58,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882373294] [2024-11-08 14:26:58,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882373294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:26:58,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547219523] [2024-11-08 14:26:58,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:26:58,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:26:58,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:26:58,034 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:26:58,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 14:26:58,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 14:26:58,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:26:58,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-08 14:26:58,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:27:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 103 proven. 17 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-08 14:27:00,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:27:03,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547219523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:27:03,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 14:27:03,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 29 [2024-11-08 14:27:03,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242537693] [2024-11-08 14:27:03,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 14:27:03,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 14:27:03,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:27:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 14:27:03,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2024-11-08 14:27:03,108 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 26 states have internal predecessors, (65), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 10 states have call predecessors, (29), 8 states have call successors, (29) [2024-11-08 14:27:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:27:04,059 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2024-11-08 14:27:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 14:27:04,059 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 26 states have internal predecessors, (65), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 10 states have call predecessors, (29), 8 states have call successors, (29) Word has length 131 [2024-11-08 14:27:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:27:04,060 INFO L225 Difference]: With dead ends: 84 [2024-11-08 14:27:04,060 INFO L226 Difference]: Without dead ends: 0 [2024-11-08 14:27:04,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=392, Invalid=1960, Unknown=0, NotChecked=0, Total=2352 [2024-11-08 14:27:04,062 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 14:27:04,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 273 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 14:27:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-08 14:27:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-08 14:27:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:27:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-08 14:27:04,063 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 131 [2024-11-08 14:27:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:27:04,063 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-08 14:27:04,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 26 states have internal predecessors, (65), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 10 states have call predecessors, (29), 8 states have call successors, (29) [2024-11-08 14:27:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-08 14:27:04,064 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-08 14:27:04,066 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-08 14:27:04,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 14:27:04,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:27:04,269 INFO L407 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:27:04,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-08 14:27:06,861 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-08 14:27:06,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.11 02:27:06 BoogieIcfgContainer [2024-11-08 14:27:06,905 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-08 14:27:06,905 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-08 14:27:06,905 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-08 14:27:06,905 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-08 14:27:06,906 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:26:27" (3/4) ... [2024-11-08 14:27:06,908 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-08 14:27:06,912 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-11-08 14:27:06,912 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-08 14:27:06,918 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-08 14:27:06,921 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-08 14:27:06,921 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-08 14:27:06,922 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-08 14:27:07,036 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-08 14:27:07,036 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-08 14:27:07,037 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-08 14:27:07,037 INFO L158 Benchmark]: Toolchain (without parser) took 39989.21ms. Allocated memory was 144.7MB in the beginning and 272.6MB in the end (delta: 127.9MB). Free memory was 70.7MB in the beginning and 103.4MB in the end (delta: -32.7MB). Peak memory consumption was 96.7MB. Max. memory is 16.1GB. [2024-11-08 14:27:07,037 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 144.7MB. Free memory is still 117.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 14:27:07,038 INFO L158 Benchmark]: CACSL2BoogieTranslator took 319.90ms. Allocated memory is still 144.7MB. Free memory was 70.5MB in the beginning and 112.4MB in the end (delta: -42.0MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2024-11-08 14:27:07,038 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.98ms. Allocated memory is still 144.7MB. Free memory was 111.8MB in the beginning and 110.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 14:27:07,038 INFO L158 Benchmark]: Boogie Preprocessor took 52.72ms. Allocated memory is still 144.7MB. Free memory was 110.3MB in the beginning and 108.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 14:27:07,038 INFO L158 Benchmark]: RCFGBuilder took 285.95ms. Allocated memory is still 144.7MB. Free memory was 108.2MB in the beginning and 96.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-08 14:27:07,039 INFO L158 Benchmark]: TraceAbstraction took 39159.67ms. Allocated memory was 144.7MB in the beginning and 272.6MB in the end (delta: 127.9MB). Free memory was 95.6MB in the beginning and 108.6MB in the end (delta: -13.0MB). Peak memory consumption was 147.7MB. Max. memory is 16.1GB. [2024-11-08 14:27:07,039 INFO L158 Benchmark]: Witness Printer took 131.67ms. Allocated memory is still 272.6MB. Free memory was 108.6MB in the beginning and 103.4MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-11-08 14:27:07,040 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 144.7MB. Free memory is still 117.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 319.90ms. Allocated memory is still 144.7MB. Free memory was 70.5MB in the beginning and 112.4MB in the end (delta: -42.0MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.98ms. Allocated memory is still 144.7MB. Free memory was 111.8MB in the beginning and 110.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.72ms. Allocated memory is still 144.7MB. Free memory was 110.3MB in the beginning and 108.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 285.95ms. Allocated memory is still 144.7MB. Free memory was 108.2MB in the beginning and 96.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 39159.67ms. Allocated memory was 144.7MB in the beginning and 272.6MB in the end (delta: 127.9MB). Free memory was 95.6MB in the beginning and 108.6MB in the end (delta: -13.0MB). Peak memory consumption was 147.7MB. Max. memory is 16.1GB. * Witness Printer took 131.67ms. Allocated memory is still 272.6MB. Free memory was 108.6MB in the beginning and 103.4MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 36.5s, OverallIterations: 20, TraceHistogramMax: 17, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 10.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 912 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 831 mSDsluCounter, 5598 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4796 mSDsCounter, 607 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4437 IncrementalHoareTripleChecker+Invalid, 5044 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 607 mSolverCounterUnsat, 802 mSDtfsCounter, 4437 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2434 GetRequests, 2033 SyntacticMatches, 14 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2631 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=303occurred in iteration=14, InterpolantAutomatonStates: 233, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 20 MinimizatonAttempts, 201 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 19.8s InterpolantComputationTime, 2438 NumberOfCodeBlocks, 2344 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 2685 ConstructedInterpolants, 0 QuantifiedInterpolants, 11716 SizeOfPredicates, 55 NumberOfNonLiveVariables, 2729 ConjunctsInSsa, 384 ConjunctsInUnsatCore, 38 InterpolantComputations, 8 PerfectInterpolantSequences, 5580/6048 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((((((((((((((c == 0) && (b == 1)) && (p == 1)) && (r == 0)) && (q == 0)) && (y == 1)) && (1 <= x)) && (k == x)) && (a == x)) && (x <= 2)) && (s == 1)) || ((((((((((c == 0) && (b == 1)) && (p == 0)) && (2 == y)) && (x == 1)) && (q == 1)) && (s == 0)) && (r == 1)) && (2 == a)) && (2 == k))) || (((((((((((c == 0) && (k == 1)) && (p == 1)) && (b == y)) && (b == x)) && (r == 0)) && (q == 0)) && (1 <= x)) && (a == x)) && (x <= 2)) && (s == 1))) || ((((((((((b == 1) && (p == 0)) && (2 == y)) && (x == 1)) && (q == 1)) && (k == 0)) && (s == 0)) && (r == 1)) && (2 == a)) && (2 == c))) || ((((((((((((p == 1) && (1 <= y)) && (a == c)) && (b == y)) && (b <= 2)) && (r == 0)) && (q == 0)) && (k == 0)) && (1 <= x)) && (a == x)) && (x <= 2)) && (s == 1))) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((((((((((((((((d == 1) && (b == 1)) && (p == 0)) && (v == 1)) && (2 == y)) && (x == 1)) && (q == 1)) && (k == 0)) && (s == 0)) && (r == 1)) && (2 == a)) && (2 == c)) || ((((((((((((b == 1) && (p == 0)) && (2 == v)) && (2 == y)) && (x == 1)) && (q == 1)) && (k == 0)) && (s == 0)) && (r == 1)) && (2 == a)) && (2 == c)) && (2 == d))) || (((((((((((((b == 1) && (p == 0)) && (v <= 1)) && (2 == y)) && (x == 1)) && (q == 1)) && (d == v)) && (k == 0)) && (s == 0)) && (r == 1)) && (2 == a)) && (2 == c)) && (((d >= 0) ? (d % 2) : ((d % 2) + 2)) == 0))) || (((((((((((((p == 1) && ((y + ((__int128) d * y)) == ((__int128) b + x))) && (((__int128) b * d) == v)) && (b == y)) && (v <= c)) && (r == 0)) && (q == 0)) && (k == 0)) && (1 <= x)) && (c <= 2)) && (((__int128) 2 * b) == v)) && (a == x)) && (s == 1))) || (((((((((((((d == 1) && (p == 1)) && (1 <= y)) && (a == c)) && (b == y)) && (b == v)) && (r == 0)) && (q == 0)) && (k == 0)) && (b <= c)) && (a == x)) && (x <= 2)) && (s == 1))) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((((b == 1) && (p == 0)) && (2 == y)) && (x == 1)) && (q == 1)) && (s == 0)) && (r == 1)) && (2 == a)) || ((((((((((1 <= p) && ((s + ((__int128) 2 * r)) == 1)) && (y <= 2)) && (b == 0)) && (0 <= r)) && (1 <= a)) && (1 <= x)) && ((q + ((__int128) 2 * p)) == 0)) && ((((__int128) r * y) + ((__int128) p * x)) == a)) && (((__int128) a + 1) <= y))) || (((((((((y == ((a + ((__int128) s * y)) + ((__int128) q * x))) && (p == 0)) && (a == y)) && (a <= 2)) && (b == 0)) && (1 <= a)) && (1 <= x)) && (r == 1)) && (x <= 2))) || ((((((((((p == 1) && (b == y)) && (b <= 2)) && (1 <= b)) && (r == 0)) && (q == 0)) && (1 <= x)) && (a == x)) && (x <= 2)) && (s == 1))) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-11-08 14:27:07,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE