./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bba06987e8c2f8236800dde4bec4c9d50f427f841de99efa853660259681b37 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 00:05:34,572 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 00:05:34,622 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 00:05:34,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 00:05:34,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 00:05:34,652 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 00:05:34,653 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 00:05:34,653 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 00:05:34,654 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 00:05:34,654 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 00:05:34,654 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 00:05:34,655 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 00:05:34,655 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 00:05:34,656 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 00:05:34,656 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 00:05:34,656 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 00:05:34,657 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 00:05:34,657 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 00:05:34,657 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 00:05:34,658 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 00:05:34,658 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 00:05:34,659 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 00:05:34,659 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 00:05:34,659 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 00:05:34,660 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 00:05:34,660 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 00:05:34,660 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 00:05:34,661 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 00:05:34,661 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 00:05:34,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 00:05:34,662 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 00:05:34,662 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 00:05:34,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:05:34,663 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 00:05:34,663 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 00:05:34,663 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 00:05:34,664 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 00:05:34,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 00:05:34,664 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 00:05:34,664 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 00:05:34,665 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 00:05:34,665 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 00:05:34,665 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bba06987e8c2f8236800dde4bec4c9d50f427f841de99efa853660259681b37 [2024-10-24 00:05:34,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 00:05:34,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 00:05:34,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 00:05:34,973 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 00:05:34,973 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 00:05:34,974 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c [2024-10-24 00:05:36,347 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 00:05:36,544 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 00:05:36,545 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c [2024-10-24 00:05:36,552 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aa43a509/78199248cfcd4e6e8dffc86471f7ab3a/FLAGaf03f156f [2024-10-24 00:05:36,939 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aa43a509/78199248cfcd4e6e8dffc86471f7ab3a [2024-10-24 00:05:36,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 00:05:36,946 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 00:05:36,948 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 00:05:36,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 00:05:36,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 00:05:36,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:05:36" (1/1) ... [2024-10-24 00:05:36,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13b0f3cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:36, skipping insertion in model container [2024-10-24 00:05:36,958 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:05:36" (1/1) ... [2024-10-24 00:05:36,981 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 00:05:37,162 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c[525,538] [2024-10-24 00:05:37,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:05:37,211 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 00:05:37,224 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c[525,538] [2024-10-24 00:05:37,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:05:37,265 INFO L204 MainTranslator]: Completed translation [2024-10-24 00:05:37,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37 WrapperNode [2024-10-24 00:05:37,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 00:05:37,267 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 00:05:37,267 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 00:05:37,267 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 00:05:37,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,281 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,310 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2024-10-24 00:05:37,311 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 00:05:37,314 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 00:05:37,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 00:05:37,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 00:05:37,324 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,327 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,343 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]. [2024-10-24 00:05:37,343 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,344 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,347 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,351 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,352 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,353 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 00:05:37,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 00:05:37,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 00:05:37,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 00:05:37,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (1/1) ... [2024-10-24 00:05:37,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:05:37,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:05:37,389 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) [2024-10-24 00:05:37,396 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 [2024-10-24 00:05:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 00:05:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-24 00:05:37,441 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-24 00:05:37,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 00:05:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 00:05:37,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 00:05:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 00:05:37,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 00:05:37,511 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 00:05:37,514 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 00:05:37,755 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-24 00:05:37,755 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 00:05:37,773 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 00:05:37,773 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 00:05:37,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:05:37 BoogieIcfgContainer [2024-10-24 00:05:37,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 00:05:37,775 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 00:05:37,775 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 00:05:37,778 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 00:05:37,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:05:36" (1/3) ... [2024-10-24 00:05:37,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c96f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:05:37, skipping insertion in model container [2024-10-24 00:05:37,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:37" (2/3) ... [2024-10-24 00:05:37,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c96f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:05:37, skipping insertion in model container [2024-10-24 00:05:37,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:05:37" (3/3) ... [2024-10-24 00:05:37,780 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound100.c [2024-10-24 00:05:37,792 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 00:05:37,792 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 00:05:37,842 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 00:05:37,848 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;@509311b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 00:05:37,849 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 00:05:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-24 00:05:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-24 00:05:37,857 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:05:37,858 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:05:37,858 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:05:37,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:05:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash -10312671, now seen corresponding path program 1 times [2024-10-24 00:05:37,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:05:37,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738297298] [2024-10-24 00:05:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:05:37,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:05:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:37,995 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:05:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:38,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:05:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:05:38,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:05:38,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738297298] [2024-10-24 00:05:38,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738297298] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:05:38,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:05:38,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 00:05:38,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395339195] [2024-10-24 00:05:38,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:05:38,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 00:05:38,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:05:38,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 00:05:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:05:38,045 INFO L87 Difference]: Start difference. First operand has 30 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 00:05:38,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:05:38,071 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2024-10-24 00:05:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 00:05:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-10-24 00:05:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:05:38,079 INFO L225 Difference]: With dead ends: 58 [2024-10-24 00:05:38,079 INFO L226 Difference]: Without dead ends: 28 [2024-10-24 00:05:38,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:05:38,085 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:05:38,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:05:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-24 00:05:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-24 00:05:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 00:05:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2024-10-24 00:05:38,123 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 18 [2024-10-24 00:05:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:05:38,123 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2024-10-24 00:05:38,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 00:05:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2024-10-24 00:05:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-24 00:05:38,125 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:05:38,125 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:05:38,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 00:05:38,126 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:05:38,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:05:38,127 INFO L85 PathProgramCache]: Analyzing trace with hash 763841584, now seen corresponding path program 1 times [2024-10-24 00:05:38,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:05:38,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613566952] [2024-10-24 00:05:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:05:38,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:05:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:38,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:05:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:38,615 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:05:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:05:38,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:05:38,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613566952] [2024-10-24 00:05:38,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613566952] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:05:38,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:05:38,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 00:05:38,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445139423] [2024-10-24 00:05:38,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:05:38,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 00:05:38,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:05:38,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 00:05:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:05:38,629 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-10-24 00:05:42,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:05:46,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:05:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:05:46,880 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2024-10-24 00:05:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 00:05:46,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 19 [2024-10-24 00:05:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:05:46,894 INFO L225 Difference]: With dead ends: 60 [2024-10-24 00:05:46,895 INFO L226 Difference]: Without dead ends: 42 [2024-10-24 00:05:46,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-24 00:05:46,897 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:05:46,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 158 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 50 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2024-10-24 00:05:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-24 00:05:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-24 00:05:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-24 00:05:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2024-10-24 00:05:46,920 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 19 [2024-10-24 00:05:46,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:05:46,920 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2024-10-24 00:05:46,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-10-24 00:05:46,921 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2024-10-24 00:05:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 00:05:46,922 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:05:46,922 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:05:46,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 00:05:46,922 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:05:46,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:05:46,923 INFO L85 PathProgramCache]: Analyzing trace with hash -82339253, now seen corresponding path program 1 times [2024-10-24 00:05:46,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:05:46,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517808706] [2024-10-24 00:05:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:05:46,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:05:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:47,284 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:05:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:47,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:05:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:05:47,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:05:47,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517808706] [2024-10-24 00:05:47,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517808706] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:05:47,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997258482] [2024-10-24 00:05:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:05:47,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:05:47,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:05:47,300 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) [2024-10-24 00:05:47,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 00:05:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:47,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 00:05:47,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:05:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:05:47,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:05:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:05:47,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997258482] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:05:47,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:05:47,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-24 00:05:47,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370249566] [2024-10-24 00:05:47,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:05:47,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 00:05:47,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:05:47,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 00:05:47,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:05:47,745 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 00:05:53,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 00:05:53,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:05:53,542 INFO L93 Difference]: Finished difference Result 111 states and 177 transitions. [2024-10-24 00:05:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 00:05:53,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-10-24 00:05:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:05:53,545 INFO L225 Difference]: With dead ends: 111 [2024-10-24 00:05:53,545 INFO L226 Difference]: Without dead ends: 93 [2024-10-24 00:05:53,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-10-24 00:05:53,547 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 116 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-10-24 00:05:53,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 252 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 196 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2024-10-24 00:05:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-24 00:05:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2024-10-24 00:05:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-24 00:05:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2024-10-24 00:05:53,567 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 21 [2024-10-24 00:05:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:05:53,567 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2024-10-24 00:05:53,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 00:05:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2024-10-24 00:05:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-24 00:05:53,569 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:05:53,569 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:05:53,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 00:05:53,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:05:53,771 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:05:53,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:05:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash -93184560, now seen corresponding path program 1 times [2024-10-24 00:05:53,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:05:53,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133518714] [2024-10-24 00:05:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:05:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:05:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:05:53,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721266748] [2024-10-24 00:05:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:05:53,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:05:53,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:05:53,802 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) [2024-10-24 00:05:53,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 00:05:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:53,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:05:53,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:05:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 00:05:53,901 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:05:53,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:05:53,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133518714] [2024-10-24 00:05:53,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:05:53,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721266748] [2024-10-24 00:05:53,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721266748] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:05:53,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:05:53,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:05:53,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279174794] [2024-10-24 00:05:53,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:05:53,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:05:53,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:05:53,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:05:53,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:05:53,905 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 00:05:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:05:53,988 INFO L93 Difference]: Finished difference Result 86 states and 123 transitions. [2024-10-24 00:05:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:05:53,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-10-24 00:05:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:05:53,991 INFO L225 Difference]: With dead ends: 86 [2024-10-24 00:05:53,992 INFO L226 Difference]: Without dead ends: 83 [2024-10-24 00:05:53,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:05:53,994 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:05:53,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 123 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:05:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-24 00:05:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-10-24 00:05:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 39 states have (on average 1.205128205128205) internal successors, (47), 41 states have internal predecessors, (47), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-10-24 00:05:54,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2024-10-24 00:05:54,012 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 29 [2024-10-24 00:05:54,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:05:54,013 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2024-10-24 00:05:54,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 00:05:54,013 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2024-10-24 00:05:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 00:05:54,014 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:05:54,014 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:05:54,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 00:05:54,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-24 00:05:54,219 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:05:54,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:05:54,219 INFO L85 PathProgramCache]: Analyzing trace with hash 471953405, now seen corresponding path program 1 times [2024-10-24 00:05:54,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:05:54,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420022289] [2024-10-24 00:05:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:05:54,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:05:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:05:54,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304804106] [2024-10-24 00:05:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:05:54,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:05:54,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:05:54,251 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) [2024-10-24 00:05:54,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 00:05:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:05:54,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 00:05:54,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:05:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:05:54,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:05:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:05:55,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:05:55,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420022289] [2024-10-24 00:05:55,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:05:55,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304804106] [2024-10-24 00:05:55,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304804106] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:05:55,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:05:55,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-24 00:05:55,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419502319] [2024-10-24 00:05:55,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:05:55,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 00:05:55,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:05:55,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 00:05:55,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:05:55,537 INFO L87 Difference]: Start difference. First operand 83 states and 119 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 00:06:01,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:02,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 00:06:08,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:13,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:18,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:23,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:27,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:31,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:35,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:39,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:43,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:45,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:06:45,728 INFO L93 Difference]: Finished difference Result 152 states and 222 transitions. [2024-10-24 00:06:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 00:06:45,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-10-24 00:06:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:06:45,730 INFO L225 Difference]: With dead ends: 152 [2024-10-24 00:06:45,730 INFO L226 Difference]: Without dead ends: 128 [2024-10-24 00:06:45,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:06:45,734 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 61 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:06:45,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 312 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 207 Invalid, 10 Unknown, 0 Unchecked, 48.2s Time] [2024-10-24 00:06:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-10-24 00:06:45,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2024-10-24 00:06:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 60 states have internal predecessors, (68), 55 states have call successors, (55), 9 states have call predecessors, (55), 9 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-10-24 00:06:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 176 transitions. [2024-10-24 00:06:45,773 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 176 transitions. Word has length 28 [2024-10-24 00:06:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:06:45,773 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 176 transitions. [2024-10-24 00:06:45,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 00:06:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 176 transitions. [2024-10-24 00:06:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-24 00:06:45,775 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:06:45,775 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:06:45,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-24 00:06:45,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:06:45,977 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:06:45,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:06:45,977 INFO L85 PathProgramCache]: Analyzing trace with hash -416609438, now seen corresponding path program 1 times [2024-10-24 00:06:45,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:06:45,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850598224] [2024-10-24 00:06:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:06:45,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:06:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:06:46,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769841504] [2024-10-24 00:06:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:06:46,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:06:46,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:06:46,026 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) [2024-10-24 00:06:46,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 00:06:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:06:46,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:06:46,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:06:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-24 00:06:46,254 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:06:46,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:06:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850598224] [2024-10-24 00:06:46,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:06:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769841504] [2024-10-24 00:06:46,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769841504] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:06:46,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:06:46,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 00:06:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836759353] [2024-10-24 00:06:46,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:06:46,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 00:06:46,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:06:46,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 00:06:46,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-10-24 00:06:46,258 INFO L87 Difference]: Start difference. First operand 122 states and 176 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-24 00:06:50,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 00:06:54,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:06:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:06:54,852 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2024-10-24 00:06:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 00:06:54,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-10-24 00:06:54,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:06:54,889 INFO L225 Difference]: With dead ends: 136 [2024-10-24 00:06:54,889 INFO L226 Difference]: Without dead ends: 134 [2024-10-24 00:06:54,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-24 00:06:54,890 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 9 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2024-10-24 00:06:54,890 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 205 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2024-10-24 00:06:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-24 00:06:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-10-24 00:06:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 69 states have internal predecessors, (77), 55 states have call successors, (55), 12 states have call predecessors, (55), 12 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-10-24 00:06:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 185 transitions. [2024-10-24 00:06:54,915 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 185 transitions. Word has length 40 [2024-10-24 00:06:54,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:06:54,916 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 185 transitions. [2024-10-24 00:06:54,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-24 00:06:54,916 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 185 transitions. [2024-10-24 00:06:54,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-24 00:06:54,921 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:06:54,921 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:06:54,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 00:06:55,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:06:55,122 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:06:55,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:06:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash -208842498, now seen corresponding path program 1 times [2024-10-24 00:06:55,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:06:55,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799815324] [2024-10-24 00:06:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:06:55,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:06:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:06:55,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909435801] [2024-10-24 00:06:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:06:55,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:06:55,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:06:55,176 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) [2024-10-24 00:06:55,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 00:06:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:06:55,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 00:06:55,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:06:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-24 00:06:55,428 INFO L311 TraceCheckSpWp]: Computing backward predicates...