./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.factorial4even.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f 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/hardware-verification-bv/btor2c-lazyMod.factorial4even.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash a9bfc0bfd402f01a909df8198af653a6c40e8b771ded2d89ed782f9da2aa5bbb --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 23:58:18,734 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 23:58:18,811 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-11-11 23:58:18,817 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 23:58:18,818 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 23:58:18,841 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 23:58:18,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 23:58:18,843 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 23:58:18,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 23:58:18,845 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 23:58:18,846 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 23:58:18,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 23:58:18,847 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 23:58:18,847 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 23:58:18,849 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 23:58:18,849 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 23:58:18,850 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 23:58:18,850 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 23:58:18,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 23:58:18,850 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 23:58:18,850 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 23:58:18,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 23:58:18,853 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 23:58:18,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 23:58:18,853 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 23:58:18,854 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 23:58:18,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 23:58:18,854 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 23:58:18,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 23:58:18,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 23:58:18,855 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 23:58:18,855 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 23:58:18,855 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 23:58:18,855 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 23:58:18,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 23:58:18,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 23:58:18,855 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 23:58:18,856 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 23:58:18,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 23:58:18,856 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9bfc0bfd402f01a909df8198af653a6c40e8b771ded2d89ed782f9da2aa5bbb [2024-11-11 23:58:19,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 23:58:19,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 23:58:19,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 23:58:19,101 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 23:58:19,101 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 23:58:19,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.factorial4even.c [2024-11-11 23:58:20,447 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 23:58:20,633 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 23:58:20,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.factorial4even.c [2024-11-11 23:58:20,640 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72829d57a/d20a9eb312d54bd6a276864f9671fa90/FLAGc10ae256d [2024-11-11 23:58:21,011 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72829d57a/d20a9eb312d54bd6a276864f9671fa90 [2024-11-11 23:58:21,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 23:58:21,014 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 23:58:21,020 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 23:58:21,020 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 23:58:21,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 23:58:21,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d54af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21, skipping insertion in model container [2024-11-11 23:58:21,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,063 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 23:58:21,201 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/hardware-verification-bv/btor2c-lazyMod.factorial4even.c[1439,1452] [2024-11-11 23:58:21,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 23:58:21,241 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 23:58:21,250 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/hardware-verification-bv/btor2c-lazyMod.factorial4even.c[1439,1452] [2024-11-11 23:58:21,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 23:58:21,280 INFO L204 MainTranslator]: Completed translation [2024-11-11 23:58:21,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21 WrapperNode [2024-11-11 23:58:21,280 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 23:58:21,281 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 23:58:21,281 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 23:58:21,284 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 23:58:21,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,299 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,331 INFO L138 Inliner]: procedures = 17, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 98 [2024-11-11 23:58:21,331 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 23:58:21,332 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 23:58:21,332 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 23:58:21,332 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 23:58:21,340 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,342 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,354 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]. [2024-11-11 23:58:21,355 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,355 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,358 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,361 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,363 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,365 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 23:58:21,366 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 23:58:21,366 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 23:58:21,366 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 23:58:21,366 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (1/1) ... [2024-11-11 23:58:21,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 23:58:21,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 23:58:21,400 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) [2024-11-11 23:58:21,414 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 [2024-11-11 23:58:21,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 23:58:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 23:58:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 23:58:21,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 23:58:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 23:58:21,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 23:58:21,533 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 23:58:21,535 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 23:58:21,778 INFO L? ?]: Removed 41 outVars from TransFormulas that were not future-live. [2024-11-11 23:58:21,779 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 23:58:21,788 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 23:58:21,788 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-11 23:58:21,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 11:58:21 BoogieIcfgContainer [2024-11-11 23:58:21,789 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 23:58:21,790 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 23:58:21,790 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 23:58:21,793 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 23:58:21,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 11:58:21" (1/3) ... [2024-11-11 23:58:21,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79062b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 11:58:21, skipping insertion in model container [2024-11-11 23:58:21,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:21" (2/3) ... [2024-11-11 23:58:21,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79062b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 11:58:21, skipping insertion in model container [2024-11-11 23:58:21,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 11:58:21" (3/3) ... [2024-11-11 23:58:21,795 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.factorial4even.c [2024-11-11 23:58:21,808 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 23:58:21,809 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 23:58:21,849 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 23:58:21,854 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;@61db5ed3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 23:58:21,854 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 23:58:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 23:58:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-11 23:58:21,862 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 23:58:21,862 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 23:58:21,863 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 23:58:21,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 23:58:21,867 INFO L85 PathProgramCache]: Analyzing trace with hash -709712704, now seen corresponding path program 1 times [2024-11-11 23:58:21,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 23:58:21,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080784781] [2024-11-11 23:58:21,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:21,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 23:58:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 23:58:22,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 23:58:22,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080784781] [2024-11-11 23:58:22,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080784781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 23:58:22,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 23:58:22,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-11 23:58:22,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280504856] [2024-11-11 23:58:22,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 23:58:22,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-11 23:58:22,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 23:58:22,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-11 23:58:22,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-11 23:58:22,380 INFO L87 Difference]: Start difference. First operand has 36 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 23:58:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 23:58:22,499 INFO L93 Difference]: Finished difference Result 80 states and 114 transitions. [2024-11-11 23:58:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 23:58:22,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-11 23:58:22,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 23:58:22,507 INFO L225 Difference]: With dead ends: 80 [2024-11-11 23:58:22,507 INFO L226 Difference]: Without dead ends: 54 [2024-11-11 23:58:22,510 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-11 23:58:22,513 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 93 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 23:58:22,513 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 183 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 23:58:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-11 23:58:22,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2024-11-11 23:58:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 34 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-11 23:58:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2024-11-11 23:58:22,544 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 11 [2024-11-11 23:58:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 23:58:22,545 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2024-11-11 23:58:22,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 23:58:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2024-11-11 23:58:22,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-11 23:58:22,546 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 23:58:22,546 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 23:58:22,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 23:58:22,547 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 23:58:22,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 23:58:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1831448307, now seen corresponding path program 1 times [2024-11-11 23:58:22,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 23:58:22,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968906408] [2024-11-11 23:58:22,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:22,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 23:58:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:22,702 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 23:58:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 23:58:22,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 23:58:22,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968906408] [2024-11-11 23:58:22,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968906408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 23:58:22,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 23:58:22,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-11 23:58:22,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262798237] [2024-11-11 23:58:22,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 23:58:22,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 23:58:22,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 23:58:22,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 23:58:22,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-11 23:58:22,717 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 23:58:22,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 23:58:22,766 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2024-11-11 23:58:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 23:58:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-11-11 23:58:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 23:58:22,769 INFO L225 Difference]: With dead ends: 52 [2024-11-11 23:58:22,769 INFO L226 Difference]: Without dead ends: 50 [2024-11-11 23:58:22,769 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-11 23:58:22,772 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 23:58:22,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 203 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 23:58:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-11 23:58:22,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2024-11-11 23:58:22,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 23:58:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-11-11 23:58:22,784 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 21 [2024-11-11 23:58:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 23:58:22,785 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-11-11 23:58:22,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 23:58:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-11-11 23:58:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-11 23:58:22,786 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 23:58:22,786 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 23:58:22,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 23:58:22,787 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 23:58:22,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 23:58:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash 659600128, now seen corresponding path program 1 times [2024-11-11 23:58:22,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 23:58:22,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703661675] [2024-11-11 23:58:22,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:22,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 23:58:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:22,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 23:58:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 23:58:22,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 23:58:22,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703661675] [2024-11-11 23:58:22,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703661675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 23:58:22,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 23:58:22,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 23:58:22,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178567527] [2024-11-11 23:58:22,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 23:58:22,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 23:58:22,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 23:58:22,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 23:58:22,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 23:58:22,874 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 23:58:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 23:58:22,903 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2024-11-11 23:58:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 23:58:22,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-11-11 23:58:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 23:58:22,905 INFO L225 Difference]: With dead ends: 76 [2024-11-11 23:58:22,905 INFO L226 Difference]: Without dead ends: 47 [2024-11-11 23:58:22,906 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 23:58:22,907 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 23:58:22,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 23:58:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-11 23:58:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-11 23:58:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 41 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 23:58:22,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2024-11-11 23:58:22,940 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 22 [2024-11-11 23:58:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 23:58:22,942 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2024-11-11 23:58:22,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 23:58:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2024-11-11 23:58:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-11 23:58:22,943 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 23:58:22,943 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 23:58:22,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-11 23:58:22,944 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 23:58:22,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 23:58:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash 360332806, now seen corresponding path program 1 times [2024-11-11 23:58:22,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 23:58:22,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991123703] [2024-11-11 23:58:22,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:22,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 23:58:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:23,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 23:58:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 23:58:23,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 23:58:23,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991123703] [2024-11-11 23:58:23,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991123703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 23:58:23,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 23:58:23,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-11 23:58:23,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217686445] [2024-11-11 23:58:23,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 23:58:23,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 23:58:23,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 23:58:23,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 23:58:23,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-11 23:58:23,154 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 23:58:23,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 23:58:23,225 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2024-11-11 23:58:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 23:58:23,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-11-11 23:58:23,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 23:58:23,226 INFO L225 Difference]: With dead ends: 89 [2024-11-11 23:58:23,226 INFO L226 Difference]: Without dead ends: 58 [2024-11-11 23:58:23,227 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-11 23:58:23,227 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 54 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 23:58:23,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 148 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 23:58:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-11 23:58:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2024-11-11 23:58:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 23:58:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2024-11-11 23:58:23,233 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 23 [2024-11-11 23:58:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 23:58:23,233 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2024-11-11 23:58:23,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 23:58:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2024-11-11 23:58:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-11 23:58:23,234 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 23:58:23,234 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 23:58:23,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-11 23:58:23,234 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 23:58:23,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 23:58:23,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1122481794, now seen corresponding path program 1 times [2024-11-11 23:58:23,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 23:58:23,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278437053] [2024-11-11 23:58:23,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:23,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 23:58:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:23,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 23:58:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:23,390 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-11 23:58:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 23:58:23,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 23:58:23,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278437053] [2024-11-11 23:58:23,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278437053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 23:58:23,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795347834] [2024-11-11 23:58:23,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:23,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 23:58:23,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 23:58:23,411 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) [2024-11-11 23:58:23,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 23:58:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:23,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-11 23:58:23,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 23:58:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 23:58:23,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 23:58:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 23:58:23,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795347834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 23:58:23,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 23:58:23,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 23 [2024-11-11 23:58:23,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558170913] [2024-11-11 23:58:23,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 23:58:23,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-11 23:58:23,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 23:58:23,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-11 23:58:23,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2024-11-11 23:58:23,897 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 23 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 22 states have internal predecessors, (51), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-11 23:58:24,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 23:58:24,094 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2024-11-11 23:58:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-11 23:58:24,095 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 22 states have internal predecessors, (51), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 30 [2024-11-11 23:58:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 23:58:24,100 INFO L225 Difference]: With dead ends: 88 [2024-11-11 23:58:24,100 INFO L226 Difference]: Without dead ends: 86 [2024-11-11 23:58:24,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2024-11-11 23:58:24,101 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 194 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 23:58:24,101 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 424 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 23:58:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-11 23:58:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2024-11-11 23:58:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-11 23:58:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-11-11 23:58:24,114 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 30 [2024-11-11 23:58:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 23:58:24,114 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-11-11 23:58:24,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 22 states have internal predecessors, (51), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-11 23:58:24,114 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-11-11 23:58:24,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-11 23:58:24,115 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 23:58:24,115 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 23:58:24,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 23:58:24,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 23:58:24,316 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 23:58:24,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 23:58:24,320 INFO L85 PathProgramCache]: Analyzing trace with hash 660343066, now seen corresponding path program 1 times [2024-11-11 23:58:24,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 23:58:24,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897404369] [2024-11-11 23:58:24,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:24,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 23:58:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:24,447 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 23:58:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:24,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-11 23:58:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 23:58:24,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 23:58:24,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897404369] [2024-11-11 23:58:24,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897404369] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 23:58:24,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 23:58:24,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 23:58:24,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776446908] [2024-11-11 23:58:24,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 23:58:24,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 23:58:24,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 23:58:24,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 23:58:24,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 23:58:24,478 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 23:58:24,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 23:58:24,554 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2024-11-11 23:58:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 23:58:24,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-11 23:58:24,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 23:58:24,555 INFO L225 Difference]: With dead ends: 104 [2024-11-11 23:58:24,557 INFO L226 Difference]: Without dead ends: 66 [2024-11-11 23:58:24,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-11 23:58:24,558 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 23:58:24,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 74 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 23:58:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-11 23:58:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-11-11 23:58:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 54 states have internal predecessors, (64), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 23:58:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-11-11 23:58:24,565 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 31 [2024-11-11 23:58:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 23:58:24,565 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-11-11 23:58:24,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 23:58:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-11-11 23:58:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-11 23:58:24,566 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 23:58:24,566 INFO L218 NwaCegarLoop]: trace histogram [3, 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] [2024-11-11 23:58:24,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-11 23:58:24,567 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 23:58:24,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 23:58:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1881455429, now seen corresponding path program 1 times [2024-11-11 23:58:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 23:58:24,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345374541] [2024-11-11 23:58:24,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 23:58:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:24,941 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 23:58:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:24,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-11 23:58:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 23:58:24,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 23:58:24,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345374541] [2024-11-11 23:58:24,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345374541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 23:58:24,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639731891] [2024-11-11 23:58:24,950 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:24,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 23:58:24,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 23:58:24,952 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) [2024-11-11 23:58:24,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 23:58:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:25,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-11 23:58:25,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 23:58:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 23:58:25,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 23:58:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 23:58:25,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639731891] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 23:58:25,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 23:58:25,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 16] total 33 [2024-11-11 23:58:25,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141352091] [2024-11-11 23:58:25,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 23:58:25,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-11 23:58:25,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 23:58:25,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-11 23:58:25,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-11-11 23:58:25,819 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 33 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 32 states have internal predecessors, (64), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-11 23:58:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 23:58:26,314 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2024-11-11 23:58:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-11 23:58:26,315 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 32 states have internal predecessors, (64), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2024-11-11 23:58:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 23:58:26,316 INFO L225 Difference]: With dead ends: 151 [2024-11-11 23:58:26,316 INFO L226 Difference]: Without dead ends: 113 [2024-11-11 23:58:26,317 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2024-11-11 23:58:26,318 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 373 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 23:58:26,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 278 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 23:58:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-11 23:58:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2024-11-11 23:58:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 80 states have internal predecessors, (92), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-11 23:58:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2024-11-11 23:58:26,329 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 32 [2024-11-11 23:58:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 23:58:26,329 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2024-11-11 23:58:26,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 32 states have internal predecessors, (64), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-11 23:58:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2024-11-11 23:58:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-11 23:58:26,330 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 23:58:26,331 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2024-11-11 23:58:26,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 23:58:26,534 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,SelfDestructingSolverStorable6 [2024-11-11 23:58:26,535 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 23:58:26,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 23:58:26,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1047677685, now seen corresponding path program 1 times [2024-11-11 23:58:26,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 23:58:26,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476599889] [2024-11-11 23:58:26,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:26,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 23:58:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:26,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 23:58:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:26,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-11 23:58:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:26,905 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-11 23:58:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-11 23:58:26,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 23:58:26,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476599889] [2024-11-11 23:58:26,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476599889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 23:58:26,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200341984] [2024-11-11 23:58:26,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:26,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 23:58:26,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 23:58:26,917 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) [2024-11-11 23:58:26,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 23:58:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:27,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-11 23:58:27,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 23:58:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 23:58:27,503 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 23:58:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-11 23:58:27,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200341984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 23:58:27,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 23:58:27,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 15] total 32 [2024-11-11 23:58:27,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768210678] [2024-11-11 23:58:27,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 23:58:27,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-11 23:58:27,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 23:58:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-11 23:58:27,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2024-11-11 23:58:27,970 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-11 23:58:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 23:58:28,623 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2024-11-11 23:58:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-11 23:58:28,624 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 44 [2024-11-11 23:58:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 23:58:28,624 INFO L225 Difference]: With dead ends: 160 [2024-11-11 23:58:28,624 INFO L226 Difference]: Without dead ends: 97 [2024-11-11 23:58:28,626 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=472, Invalid=2390, Unknown=0, NotChecked=0, Total=2862 [2024-11-11 23:58:28,626 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 206 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 23:58:28,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 357 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 23:58:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-11 23:58:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2024-11-11 23:58:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 73 states have internal predecessors, (83), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 23:58:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2024-11-11 23:58:28,632 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 44 [2024-11-11 23:58:28,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 23:58:28,633 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2024-11-11 23:58:28,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-11 23:58:28,633 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2024-11-11 23:58:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-11 23:58:28,634 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 23:58:28,634 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 23:58:28,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-11 23:58:28,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 23:58:28,839 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 23:58:28,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 23:58:28,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1655574982, now seen corresponding path program 1 times [2024-11-11 23:58:28,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 23:58:28,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847028461] [2024-11-11 23:58:28,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:28,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 23:58:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:29,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 23:58:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:29,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-11 23:58:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:29,518 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-11 23:58:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:29,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-11 23:58:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:29,524 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-11 23:58:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:29,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-11 23:58:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-11 23:58:29,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 23:58:29,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847028461] [2024-11-11 23:58:29,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847028461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 23:58:29,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632420726] [2024-11-11 23:58:29,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:29,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 23:58:29,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 23:58:29,532 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) [2024-11-11 23:58:29,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 23:58:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:29,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-11 23:58:29,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 23:58:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 29 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-11 23:58:30,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 23:58:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 29 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-11 23:58:41,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632420726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 23:58:41,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 23:58:41,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 25] total 52 [2024-11-11 23:58:41,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754406071] [2024-11-11 23:58:41,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 23:58:41,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-11 23:58:41,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 23:58:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-11 23:58:41,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2024-11-11 23:58:41,413 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 52 states, 46 states have (on average 2.652173913043478) internal successors, (122), 51 states have internal predecessors, (122), 17 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 13 states have call predecessors, (18), 16 states have call successors, (18) [2024-11-11 23:58:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 23:58:43,308 INFO L93 Difference]: Finished difference Result 197 states and 242 transitions. [2024-11-11 23:58:43,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-11 23:58:43,308 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 46 states have (on average 2.652173913043478) internal successors, (122), 51 states have internal predecessors, (122), 17 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 13 states have call predecessors, (18), 16 states have call successors, (18) Word has length 73 [2024-11-11 23:58:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 23:58:43,309 INFO L225 Difference]: With dead ends: 197 [2024-11-11 23:58:43,309 INFO L226 Difference]: Without dead ends: 140 [2024-11-11 23:58:43,311 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=962, Invalid=4440, Unknown=0, NotChecked=0, Total=5402 [2024-11-11 23:58:43,312 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 415 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 23:58:43,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 317 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 23:58:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-11 23:58:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2024-11-11 23:58:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 117 states have internal predecessors, (134), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 12 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-11 23:58:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 166 transitions. [2024-11-11 23:58:43,323 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 166 transitions. Word has length 73 [2024-11-11 23:58:43,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 23:58:43,324 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 166 transitions. [2024-11-11 23:58:43,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 46 states have (on average 2.652173913043478) internal successors, (122), 51 states have internal predecessors, (122), 17 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 13 states have call predecessors, (18), 16 states have call successors, (18) [2024-11-11 23:58:43,324 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 166 transitions. [2024-11-11 23:58:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-11 23:58:43,325 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 23:58:43,325 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 23:58:43,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 23:58:43,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 23:58:43,526 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 23:58:43,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 23:58:43,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1192527323, now seen corresponding path program 2 times [2024-11-11 23:58:43,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 23:58:43,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099050474] [2024-11-11 23:58:43,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:58:43,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 23:58:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:44,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 23:58:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:44,356 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-11 23:58:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:44,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-11 23:58:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:44,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-11 23:58:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:44,368 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-11 23:58:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:44,371 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-11 23:58:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 23:58:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-11 23:58:44,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 23:58:44,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099050474] [2024-11-11 23:58:44,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099050474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 23:58:44,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331390151] [2024-11-11 23:58:44,376 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 23:58:44,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 23:58:44,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 23:58:44,378 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) [2024-11-11 23:58:44,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 23:58:44,484 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 23:58:44,484 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 23:58:44,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-11 23:58:44,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 23:58:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 19 proven. 62 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-11 23:58:45,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 23:58:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 19 proven. 62 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-11 23:58:58,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331390151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 23:58:58,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 23:58:58,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 28] total 62 [2024-11-11 23:58:58,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855032550] [2024-11-11 23:58:58,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 23:58:58,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-11 23:58:58,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 23:58:58,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-11 23:58:58,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2024-11-11 23:58:58,034 INFO L87 Difference]: Start difference. First operand 135 states and 166 transitions. Second operand has 62 states, 55 states have (on average 2.381818181818182) internal successors, (131), 60 states have internal predecessors, (131), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) [2024-11-11 23:59:00,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 23:59:00,695 INFO L93 Difference]: Finished difference Result 165 states and 203 transitions. [2024-11-11 23:59:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-11 23:59:00,695 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 55 states have (on average 2.381818181818182) internal successors, (131), 60 states have internal predecessors, (131), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) Word has length 74 [2024-11-11 23:59:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 23:59:00,696 INFO L225 Difference]: With dead ends: 165 [2024-11-11 23:59:00,696 INFO L226 Difference]: Without dead ends: 163 [2024-11-11 23:59:00,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2724 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1672, Invalid=6700, Unknown=0, NotChecked=0, Total=8372 [2024-11-11 23:59:00,699 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 909 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 23:59:00,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 380 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 23:59:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-11 23:59:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 142. [2024-11-11 23:59:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 123 states have internal predecessors, (139), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-11 23:59:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 173 transitions. [2024-11-11 23:59:00,709 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 173 transitions. Word has length 74 [2024-11-11 23:59:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 23:59:00,710 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 173 transitions. [2024-11-11 23:59:00,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 55 states have (on average 2.381818181818182) internal successors, (131), 60 states have internal predecessors, (131), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 13 states have call predecessors, (18), 15 states have call successors, (18) [2024-11-11 23:59:00,710 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 173 transitions. [2024-11-11 23:59:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-11 23:59:00,711 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 23:59:00,711 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 23:59:00,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-11 23:59:00,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-11 23:59:00,916 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 23:59:00,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 23:59:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash 46998507, now seen corresponding path program 2 times [2024-11-11 23:59:00,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 23:59:00,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541940459] [2024-11-11 23:59:00,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 23:59:00,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 23:59:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 23:59:00,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574541629] [2024-11-11 23:59:00,996 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 23:59:00,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 23:59:00,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 23:59:00,997 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) [2024-11-11 23:59:00,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 23:59:01,335 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 23:59:01,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 23:59:01,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-11 23:59:01,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 23:59:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 38 proven. 57 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-11 23:59:03,578 INFO L312 TraceCheckSpWp]: Computing backward predicates...